Three subsets A, B, and C of (1, 2, 3, 4, 5) have the same number of elements. Besides: (a) 1 belongs to A and B but not to C. (b) 2 belongs to A and C but not to B. (c) 3 belong to A and exactly one to B and C. (d) 4 belongs to an even number of A, B, and C. (e) 5 belongs to an odd number of A, B, and C. (f) The sums of the elements in two of the sets A, B, and C differ by 1. What is B? Select all the elements that B is made of 2 or 4 or 5 or 3 or 1.