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Data Sufficiency — Relationships: How is X related to Y? Statement I: Y and Z are children of D, who is the wife of X. Statement II: R's sister X is married to Y's father. Decide which statements are sufficient to answer the question. Choose the correct sufficiency option.

Difficulty: Easy

Statement I alone is sufficient, but Statement II alone is not sufficient.
Statement II alone is sufficient, but Statement I alone is not sufficient.
Both statements I and II together are sufficient, but neither alone is sufficient.
Either statement I or statement II alone is sufficient.
Even both statements I and II together are not sufficient.

Correct Answer: Either statement I or statement II alone is sufficient.

Explanation:

From Statement ID is X's wife; Y is D's child ⇒ X is Y's father.

From Statement IIX is married to Y's father ⇒ X is Y's mother (spouse of father).Either way, X's relationship to Y (parent) is uniquely determined from each statement alone.

Data Sufficiency — Relationships: How is X related to Y? Statement I: Y and Z are children of D, who is the wife of X. Statement II: R's sister X is married to Y's father. Decide which statements are sufficient to answer the question. Choose the correct sufficiency option.

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