[A]: The atmospheric concentration of `CO_2` at which photosynthesis just compensates for respiration is referred to as `CO_2` compensa- tion point.
[R]: The `CO_2` compensation point is reached when the amount of `CO_2` uptake is less then that generated through respiration b_ecause the level of `CO_2` in the atmosphere is more than that required for achieving `CO_2` compen- sation point.
A. If both A and R are true and R is the correct explanation of A
B. If both A and R are true but R is not the correct explanation of A
C. If A is true and R is false
D. If both A and R are false
