Seven persons, A, B, C, D, E, F and G, are staying on different floors of a building with seven floors. There are four floors between the floors of B and D, and B stays on a higher floor than D. There are two floors between the floors of E and A, and A stays on a lower floor than E. C is staying on the ground floor. G and F stay on neighbouring floors. There are two floors between the floors of C and F, and F stays on a higher floor than C.
Who is staying on the top most floor?