If the number of compounds formed by H, C, Cl and Co are N1, N2, N3 and N4 respectively, then the correct order is

A

$$N_1 > N_2 > N_3 > N_4$$

B

$$N_1 > N_2 > N_4 > N_3$$

C

$$N_2 > N_1 > N_4 > N_3$$

D

$$N_2 > N_4 > N_3 > N_1$$