Question
There are seven members in a family, four males and
four females. A is wife of C. C has two sons D and B. Z is the mother of X. How is X related to C? I.P is the nephew of D. R is married to D. II. Z is the sister in law of D. III. X is the niece of B. B is the only sibling of D. Each of the questions below consists of a question and three statements numbered I, II and III given below it. You have to decide whether the data provided in the statements are sufficient to answer the question. Read the question and all three statements and give answer accordingly.Solution
A is wife of C. C has two sons D and B. 
Statement I. P is the nephew of D. R is married to D. P is son of B. but we do not get information about X. so this statement is not sufficient. Statement II. Z is the sister in law of D. Z is the wife of D. but no info of X, hence this is also not sufficient. Statement III. X is the niece of B. B is the only sibling of D. This statement alone gives us the information that X is the daughter of D and hence granddaughter of C. therefore statement alone III is sufficient to answer the question.
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