The question given below consists of 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 all the statements and answer the question . In a certain code language: 'A + B' means A is the spouse of
B. 'A = B' means A is the child of
B. 'A > B' means A is the uncle of
B. 'A < B' means A is the father of
B. 'A $ B' means A is the sister of
B. Nine persons M, N, O, P, Q, R, S, T, and U are in the family of three generations. How is T related to R? Statement I: P < S + Q $ T, N < T Statement II: O $ M = Q = U, S = R, S + Q $ T Statement III: R + P, T > O = Q

From statement I alone, 'P < S + Q $ T, N < T' From the above information, we make the following family tree:   From statement I alone, ‘O $ M = Q = U, S = R, S + Q $ T’, we get From the above information, we make the following family tree:   So, from statement II alone, we cannot answer the above question. So, data given in statement II alone is not sufficient to answer the question. From statements I and II together, we make the following family tree: So, from statements I and II together, we cannot answer the above question. From statement I and III together, we make the following family tree: So, from statements I and III together, we get T is the brother-in-law of R's son. So, data given in statements I and III together is sufficient to answer the question. From statements II and III together, we make the following family tree: So, from statement II and III together, we get T is the brother-in-law of R's son. So, data given in statements II and III together is sufficient to answer the question. Therefore, the data in both the statements I and III together are necessary to answer the question.