The site for light reaction is

A. Grana

B. Stroma

C. ER

D. Cytoplasm

Answer: Option A

Solution(By Examveda Team)

The site for the light reaction is Grana.
The light reaction takes place in Grana i.e. in the discs of the thylakoid. There, water (H₂O) is oxidized and oxygen (O₂) is released.
The electrons freed up from water are transferred to ATP and NADPH. The dark reaction occurs outside of the thylakoids.