Three Statements S1, S2 and S3 are given below followed by a Question:
S1: C is younger than D, but older than A and B.
S2: D is the oldest.
S3: A is older than B.

Question: Who among A, B, C and D is the youngest?

Which one of the following is correct in respect of the above Statements and the Question?

Correct Option: (d) S1 and S3 together are sufficient to answer the Question.

Let us analyze the given statements: S1: C is younger than D, but older than A and B (D > C > A, B). S2: D is the oldest (D is max). S3: A is older than B (A > B). Question: Who among A, B, C and D is the youngest? From S1 alone: C > A and C > B, but we don't know whether A is older than B or B is older than A. So S1 alone is insufficient. From S1 and S3 together: S1 gives D > C > A > B (since S3 says A > B). Thus, B is clearly the youngest of all four. Therefore, statements S1 and S3 together are sufficient to answer the question.