During which reaction dihydrogen gas is not produced under normal conditions?

Let us take all the options from start.

•In option (A) if metal reacts with sulphuric acid salt of corresponding acid and dihydrogen gas is formed and same thing happens for option (B) also.

•When metal reacts with nitric acid it does not produce dihydrogen gas instead of that oxide of nitrogen is formed because nitric acid is strong oxidising agent.

•So, the correct option is (C).

•In option (D) when metal reacts with water metal hydroxide or metal oxide and dihydrogen gas is formed.