Select the correct combination of statements regarding the characteristics of productivity `:`
I. The rate of biomass production is called productivity and is expressed in terms of kcal `m^(-2)`
II. Gross primary productivity is rate of production of biomass during photosynthesis
II. Gross primary productivity minus respiration loss is called net primary productivity
IV. Primary productivity depends only on the plant species inhabiting a particular area.
The correct statements are

Options

A. I,II and III
B. II and III
C. II,III and IV
D. II and IV

Answer

A