Assertion: In $C_4$ plants, photorespiration does not occur Reason: $C_4$ plants have a mechanism that increases the concentration of $CO_2$ at enzyme site.

Question

$\begin{array}{1 1} \text{a. Both Assertion and reason are true and Reason is the correct explanation of Assertion.} \\ \text{b. Both Assertion and reason are true, but Reason is not the correct explanation of Assertion} \\ \text{c. Assertion is true, Reason is false.} \\ \text{d. Both Assertion and reason are false.} \end{array}$