Instructions

Each of the questions below consists of a question and two statements
numbered I and II given below it. You have to decide whether the data provided in the
statements are sufficient to answer the question. Read both the statements and

Give answer a: if the data in Statement I alone are sufficient to answer the question, while the data in Statement II alone are not sufficient to answer the question.
Give answer b: if the data in Statement II alone are sufficient to answer the question, while the data in Statement I alone are not sufficient to answer the question.
Give answer c: if the data in either Statement I alone or in Statement II alone are sufficient to answer the question.
Give answer d: if the data in neither Statement I nor II are sufficient to answer the question.
Give answer e: if the data in both the Statements I and II together are necessary to answer the question.

Question 160

Is C the grandmother of M ?I. C is the mother of D. D is the brother of M's father.II. E is the mother of S. S is the sister of M. F, the aunt of S is the only daughter of C.

Solution

I : C is the mother of D. D is the brother of M's father.

=> D is M's uncle and thus C is the grandmother of M.

Thus, I alone is sufficient.

II. E is the mother of S. S is the sister of M. F, the aunt of S is the only daughter of C.

=> F is the sister-in-law of E and is the daughter of C. Gender of C is unknown.

Thus, C can be either grandmother or grandfather of M, hence II alone is insufficient.

$$\therefore$$ Statement I alone is sufficient.

=> Ans - (A)