Study the given information carefully to answer the given questions: 

Seven boxes- A, B, C, D, E, F and G are kept one above the other, but not necessarily in the same order. Each box has a different number viz. 2, 4, 5, 7, 8, 9 and 12, but not necessarily in the same order. Only three boxes are kept between G and box number 9. Only two boxes are kept between G and B. B is kept at one of the positions below box number 9. Only one box is kept between B and box number 4. E is kept immediately below box number 12. E is kept at one of the places above box number 9. There is only one box between E and the box having number less than E. E's box number is neither 7 nor 8. Only two boxes are kept between box number 5 and F. The difference between F and the box immediately below it is less than four. C is not the topmost box. C's box number is not 4. Only two boxes are kept between C and A.