The reaction that is responsible for the primary fixation of `CO_(2)` is catalysed by

Options

A. RuBP carboxylase
B. PEP carboxylase
C. RuBP carboxylase and PEP carboxylase
D. PGA synthase

Answer

C

Explanation

( c) In `C_(3)` cycle RuBP craboxylase is used to fix atmospheric `CO_(2)` whereas, in `C_(4)` plants PEP carboxylase is involve in primary `CO_(2)` fixation. So, both are used in `CO_(2)` fixatation but in different cycles.
Other options are incorrect because in (a) and (b) optin is giving incomplete information and option (d) PGA synthase is not at all involved in `CO_(2)` fixation.