Assertion `:` The water gas shift reaction can be used to increase the amount of `H_(2)` in the shift `'` syn gas `'` mixture.
Reason `:` In this reaction, water is reduced to `H_(2)` by `CO`.

Assertion : The water gas shift reaction can be used to increase the amount of H_(2) in the 'syn gas' mixture. Reason : In this reaction, water is reduced to H_(2) by CO (I) If both assertion and reason are correct and reason is the correct explanation of assertion. (II) Both assertion and reason are correct but reason is not the correct explanation of assertion (III) If assertion is correct and reason is not correct (IV) Assertion is wrong and reason is correct

In water gas shift reaction reactant is

In water gas shift reaction reactant is