What comes at X and Y respectively in the following sequence? January, January, December, October, X, March, October, Y, September

The pattern in the sequence is based on the number of letters in each month name. Writing out the letter counts of the given terms: January (7), January (7), December (8), October (7), X, March (5), October (7), Y, September (9) The length sequence is: 7, 7, 8, 7, ?, 5, 7, ?, 9 For X at the 5th position, the required letter count is 4, which corresponds to July (4 letters). For Y at the 8th position, the required letter count is 5, which corresponds to April (5 letters). Substituting, the complete length sequence becomes 7, 7, 8, 7, 4, 5, 7, 5, 9, which matches the pattern. Therefore, X = July and Y = April, making option B correct.