UPSC Prelims 2024·CSAT·Logical Reasoning·Blood Relations

Consider the following including the Question and the Statements: There are 5 members A, B, C, D, E in a family. Question: What is the relation of E to B? Statement- 1: A and B are a married couple. Statement- 2: D is the father of C. Statement- 3: E is D's son. Statement- 4: A and C are sisters. Which one of the following is correct in respect of the above Questions and Statements?

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  1. AStatement-1, Statement-2 and Statement-3 are sufficient to answer the Question
  2. BStatement-1, Statement-3 and Statement-4 are sufficient to answer the Question
  3. CAll four statement together are sufficient to answer the QuestionCorrect
  4. DAll four statements are not sufficient to answer the Question.

Explanation

To determine the relation of E to B, we need to connect them through the family tree using all four statements: From Statement 1, we know A and B are a married couple. From Statement 4, we know A and C are sisters. This implies A is female and B is her husband (male). From Statement 2, we know D is the father of C. Since A and C are sisters, D must also be the father of A. From Statement 3, we know E is the son of D. This makes E the brother of A and C. By combining all four statements, we establish that E is the brother of A, and since A is married to B, E is the brother in law of B. If any statement is missing, the link is broken. For example, without Statement 4, we cannot link D and E to the couple A and B. Without Statement 1, we do not know how B relates to the siblings. Therefore, all four statements together are sufficient to answer the question.
Logical Reasoning: Consider the following including the Question and the Statements: There are 5 members A, B, C, D, E in a family. Questio

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