Read the following information carefully and answer the questions given below :
A, B, C, D, E, F and G are seven students in a class. They are sitting on three benches I, II and III in such a way that there are at least two of them on each bench and there is at least one girl on each bench. C, a girl student, does not sit with A, E and D. F, a boy student, sits with only B. A sits with his best friend in bench I. G sits on bench iii. E is brother of C.
How many girl students are there?
A 3 B 4 C 3 or 4 D Data inadequate E None of these