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How is N related to O? Statement I: N is the sister of O's father. Statement II: O's father is the only brother of N.

Competition practiceData Sufficiency
  • AEither statement alone is sufficient
  • BStatement II alone is sufficient but Statement I alone is not
  • CStatement I alone is sufficient but Statement II alone is not
  • DBoth statements together are needed (neither alone is sufficient)

Step-by-Step Solution

By I, N is the sister of O's father, so N is O's paternal aunt. By II, N is a sibling of O's father but N's gender is unknown, so I alone suffices.
Answer: C) Statement I alone is sufficient but Statement II alone is not

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