In the following question, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices:

Assertion: Activity of an enzyme is pH dependent .

Reason : Change in pH affects the solubility of the enzyme in water.

Both assertion and reason are true but the reason is not the correct explanation of the assertion.

The activity of an enzyme is pH-dependent. The activity of an enzyme is maximum at pH = 7.4 (physiological pH). In fact, as pH is increased, the enzyme activity rises, reaches a maximum level and then falls off.
Change in pH affects the solubility of the enzyme in water.