Correct option is D
Total weight of A, B, C & D = 4×40 = 160 kg
Total weight of A, B, C, D & E = 5×41 = 205 kg
Weight of E = 205 – 160 = 45 kg
Total weight of F, B, C, D & E = 5×42 = 210 kg
Total weight of B, C, D & F = 210 – 45 = 165 kg
Required average = 165/4 = 41.25 kg