The average weight of a class of 100 students in 45 kg. The class consists of two sections, A and B, each with 50 students. The average weight A1, of section A is less than the average weight A2, of section B. If the heaviest student, Shantanu, of Section B is moved to section A and the lightest student Sunder of section A is moved to section B, then the average weights of the two sections are interchanged. What is weight of Sunder? I. A2 – A1 = 1.II. If Shantanu is moved from section B to section A and Sunder is not moved, then the average weights of the two sections will be equal.

1) if the question can be answered by using statement I alone but not by using statement II alone
2) f the question can be answered by using statement II alone but not by using statement I alone
3) if the question can be answered by using either statement I alone or statement II alone, and
4) if the question can be answered by using both statements I and II together