Light energy is converted into chemical energy in the:
a. antenna complex
b. reaction center
c. stroma
d. inner membrane

The correct answer will be option-B.

Explanation:

Photosynthesis is the process which converts the light energy to chemical energy which is utilized in the formation of the glucose molecule.

The light-dependent reaction of photosynthesis begins when the photon of light is captured by the chlorophyll pigment molecules of the antenna complex. The chlorophyll electron gets excited which gets transferred via resonance pathway to a trans-membrane protein-pigment complex called photochemical reaction centre.

The photochemical reaction centre traps the excited electrons and passes the electron immediately to electron acceptors and an electron transport chain starts.  Therefore it is the petrochemical reaction centre of the photosystem which converts light energy to chemical energy and thus, Option-B is the correct answer.