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How is P related to Q? Statement I: P is the only son of Q's father. Statement II: Q is the sister of P.

Competition practiceData Sufficiency
  • AStatement II alone is sufficient but Statement I alone is not
  • BEither statement alone is sufficient
  • CBoth statements together are needed (neither alone is sufficient)
  • DStatement I alone is sufficient but Statement II alone is not

Step-by-Step Solution

From I, P is male (a son) and shares Q's father, so P is Q's brother - sufficient. From II, Q is a sister of P but P's gender is unknown, so P could be a brother or a sister - not sufficient.
Answer: D) Statement I alone is sufficient but Statement II alone is not

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