Match the following columns:

Column I	Column II
a. P700	1. PS-I
b. P680	2. PS-II
c. Grana	3. Photophosp horylation
d. Stroma	4. Fixation of CO2

a. P₇₀₀ or photosystem I primary donor, is the reaction-center chlorophyll a molecular dimer associated with photosystem I in plants, algae and cyanobacteria.
b. P₆₈₀ or photosystem II primary donor is the reaction-center chlorophyll a molecular dimer associated with photosystem II in plants, algae, and cyanobacteria, and central to oxygenic photosynthesis.
c. The phosphorylation of ADP to form ATP using the energy of sunlight is called photophosphorylation. It occurs in the grana of the chloroplast.
d. Fixation of Carbon dioxide is the process of conversion of inorganic carbon to organic compounds (glucose) by living organisms. It is called as Calvin cycle, a part of the photosynthetic process, which occurs in the stroma of chloroplasts.