Find out the correct statement from the options given below for the above 2 reactions.

'A' and 'B' in the above reactions are:

The complex that dissolves in water is :

Given below are two statements:

Statement-I : Methane and steam passed over a heated $$\mathrm{Ni}$$ catalyst produces hydrogen gas.

Statement-II : Sodium nitrite reacts with $$\mathrm{NH}_{4} \mathrm{Cl}$$ to give $$\mathrm{H}_{2} \mathrm{O}, \mathrm{N}_{2}$$ and $$\mathrm{NaCl}$$.

In the light of the above statements, choose the most appropriate answer from the options given below :