Assertion: The first end product of $CO_2$ fixation in $C_3$ pathway is $OAA$ Reason: The first product of $CO_2$ fixation in $C_4$ pathway is $PGA$.

Question

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