Assertion (A) In the day time, CO₂ generated during respiration is used up for photosynthesis.
Reason (R) There is no CO₂ release during day.
A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true, but R is not the correct explanation of A
C. A is true, but R is false
D. A is false, but R is false