RRB NTPC CBT I 12 Jan 2021 Shift 1 Paper

Seven students A, B, C, D, E, F and G take a series of test. No two students get the same marks. A always scores more than B. G always scores more than A. Each time either C scores the highest and E scores the least or D scores the highest and F or B scores the least.
If D is ranked sixth and B is ranked fifth according to their marks, then which of the following can be true?