In photosynthesis, light reaction and dark reaction in that sequence are held in

Correct option is D

The correct answer is Grana followed by stroma.
· The light-dependent reaction (light reaction) occurs in the grana (specifically in the thylakoid membranes).
· The dark reaction (Calvin cycle) occurs in the stroma of the chloroplast.
· Grana are stacks of thylakoids where chlorophyll traps sunlight.
· Stroma contains enzymes required for carbon fixation.
Information Booster:
· ATP and NADPH formed in the grana are used in the stroma for glucose synthesis.
· CO₂ is fixed into carbohydrates during the dark reaction.
· Light reaction splits water molecules and releases O₂.
· Chloroplasts have double membranes, grana, stroma, and lamellae.