UPSC Prelims 2011·CSAT·Logical Reasoning·Blood Relations

Read the following passage and answer that follow: A, B, C, D and E are members of the same family. There are two fathers, two sons, two wives, three males and two females. The teacher was the, wife of a lawyer who was the son of a doctor. E is not male, neither also a wife of a professional. C is the youngest person in the family and D is the eldest. B is a male. Whose wife is the teacher?

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Last updated 23 May 2026, 3:31 pm IST
  1. AC
  2. BD
  3. CA
  4. DBCorrect

Explanation

To solve this family relationship puzzle, we need to deduce the family structure and assign roles to members A, B, C, D, E based on the given clues. Let's break down the clues: 1. **Family Composition:** A, B, C, D, E are 5 members. There are 2 fathers, 2 sons, 2 wives, 3 males, and 2 females. * This implies a 3-generation linear family structure is likely: Grandfather (M1) -- Grandmother (F1); Father (M2) -- Mother (F2); Son (M3). * Let's verify this structure: 3 Males (M1, M2, M3), 2 Females (F1, F2), 2 Fathers (M1 is father of M2, M2 is father of M3), 2 Sons (M2 is son of M1, M3 is son of M2), 2 Wives (F1 is wife of M1, F2 is wife of M2). This structure perfectly matches all numerical counts. 2. **The teacher was the wife of a lawyer who was the son of a doctor.** * This establishes a 3-generation chain: Doctor (M1) -> Lawyer (M2, son of Doctor) -> Teacher (F2, wife of Lawyer). * So, M1 = Doctor, M2 = Lawyer, F2 = Teacher. 3. **D is the eldest.** * D must be the Grandfather (M1), who is the Doctor. So, D = Doctor. 4. **C is the youngest person in the family.** * C must be the Son (M3). 5. **B is a male.** * Since D is M1 (Doctor) and C is M3 (Son), B must be M2 (Lawyer). So, B = Lawyer. Now let's assign the names (A, B, C, D, E) to the roles in our 3-generation structure: * M1 (Grandfather/Doctor) = D * M2 (Father/Lawyer) = B * M3 (Son) = C * F2 (Mother/Teacher) = A (since A is the only remaining name for the Teacher, and we need 2 females: Teacher and Grandmother) So far: * D = Doctor (M, Eldest) * B = Lawyer (M, Son of D) * A = Teacher (F, Wife of B) * C = Son (M, Youngest) We have used A, B, C, D. The remaining member is E. The remaining role is F1 (Grandmother). So, E must be the Grandmother. Now we have a complete assignment: * D (Doctor, M, Eldest) * E (Grandmother, F) * B (Lawyer, M, Son of D and E) * A (Teacher, F, Wife of B) * C (Son, M, Youngest, Son of B and A) Let's check the last crucial clue: 6. **E is not male, neither also a wife of a professional.** * E is female (True in our assignment). * "neither also a wife of a professional": This means E's husband is not a professional. * In our current assignment, E is the wife of D (the Doctor). A Doctor is a professional. This creates a contradiction. This means our initial assumption that E is the Grandmother (F1) and married to D (Doctor) is incorrect due to the "E is not a wife of a professional" clause. Let's re-evaluate the family structure based on the numerical counts and the "E" clause. The 3-generation linear structure (Grandfather-Grandmother, Father-Mother, Son) still holds for the numerical counts. * M1 (Doctor) = D (Eldest) * M2 (Lawyer, son of D) = B (Male) * F2 (Teacher, wife of B) = A (Remaining female for Teacher) * M3 (Son, son of B) = C (Youngest) Now, for the "two wives" condition: 1. Wife 1 = A (Teacher), married to B (Lawyer). 2. Wife 2 = E (The only other female). * The clue states: "E is not ... a wife of a professional." This means E's husband cannot be a professional (Doctor or Lawyer). * The males are D (Doctor), B (Lawyer), and C (the youngest). * Since E's husband cannot be D or B, E's husband must be C. * This means C, the youngest male, is married to E. The revised family structure that satisfies all conditions: * D (Doctor, M, Eldest) - Unmarried or spouse not part of the 5 members. * B (Lawyer, M, Son of D) -- A (Teacher, F, Wife of B) * C (M, Youngest, Son of B and A) -- E (F, Wife of C) Let's verify this structure: * **Members:** A, B, C, D, E (5 members - Correct) * **Males:** D, B, C (3 males - Correct) * **Females:** A, E (2 females - Correct) * **Fathers:** D (father of B), B (father of C) (2 fathers - Correct) * **Sons:** B (son of D), C (son of B) (2 sons - Correct) * **Wives:** A (wife of B), E (wife of C) (2 wives - Correct) * **Clue 1:** Teacher (A) is wife of Lawyer (B) who is son of Doctor (D). (Correct) * **Clue 2:** E is not male (True). E is not a wife of a professional (True, E is wife of C, who is not a professional like a Doctor or Lawyer). This resolves the contradiction. * **Clue 3:** C is the youngest (True). * **Clue 4:** D is the eldest (True). * **Clue 5:** B is male (True). This revised structure is fully consistent with all clues. The question is: "Whose wife is the teacher?" In this structure, the Teacher (A) is the wife of B (the Lawyer). Final Answer is B. The final answer is D) B
Logical Reasoning: Read the following passage and answer that follow: A, B, C, D and E are members of the same family. There are two father

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