Find out the correct statement from the options given below for the above 2 reactions.
Reaction (I) is of $1^{\text {st }}$ order and reaction (II) is of $2^{\text {nd }}$ order
Reaction (I) is of $2^{\text {nd }}$ order and reaction (II) is of $1^{\text {st }}$ order
Reactions (I) and (II) both are of $2^{\text {nd }}$ order
Reactions (I) and (II) both are of $1^{\text {st }}$ order
