(e) Let A, B, C be the ages of Jose’s sons in ascending order from (ii) we get A + B + C = 13 years from (v) we get A + B = 4 years ∴ C = 9 years from (vi) we get A = B as they are twin. Hence (i), (ii), (v) and (vi) are sufficient to answer the question. Hence (e) is the correct choice