[A] : The rate of energy storage at consumer levels are referred to as primary productivities .
[R] : Net primary productivity is the total gross productivity and the energy used up in the metabolic process .

Options

A. 1)If both A and R are true and R is the correct explanation of A
B. 2)If both A and R are true but R is not the correct explanation of A
C. 3)If A is true and R is false
D. 4)If both A and R are false