Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
Assertion: Photosynthetically \[{{C}_{4}}\] plants are less efficient than \[{{C}_{3}}\] plants. Reason: The operation of \[{{C}_{4}}\] pathway requires the involvement of only bundle-sheath cells.A) If both assertion and reason are true and the reason is the correct explanation of the assertion.
B) If both assertion and reason are true but the reason is not the correct explanation of the assertion.
C) If assertion is true statement but reason is false.
D) If both assertion and reason are false.
Correct Answer: D
Solution :
Photqsynthetically \[{{C}_{4}}\] plants are more efficient than \[{{C}_{3}}\] plants because these have Kranz anatomy (connective undifferentiated mesophyll around vascular bundles with chloroplast containing bundle sheaths). Bundle sheeth chloroplasts are larger agranal and without PS-II activity and perform \[{{C}_{3}}\] cycle (Kalvin cycle).
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