(e) Let A, B, C be the ages of Jose’s sons in ascending orderfrom (ii) we get A + B + C = 13 yearsfrom (v) we get A + B = 4 years∴ C = 9 yearsfrom (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