In order to generate a crop variety with C 4 carbon fixation, a researcher expressed PEPcase enzyme from C4 pathway in leaves of the C3 plant. However, the modified C3 plant did not show carbon fixation efficiency as expected for a C4 pathway plant. The most likely reason is:

Options

1. AImproper compartmentalisation of the C4 PEPcase in C3 leaves.
2. BThe PEPcase from C4 plant is catalytically inactive in the C3 leaves.
3. CCarbon-dioxide fixed by C4 pathway PEPcase cannot be utilised by the RuBisCo of C3 leaves.
4. DOverexpression of PEPcase from C4 in C3 leaves increases photorespiration.