_ is the site of light-independent reaction.

Explanation

The light-dependent reactions take place on the thylakoid membranes. The inside of the thylakoid membrane is called the lumen, and outside the thylakoid membrane is the stroma, where the light-independent reactions take place. Thylakoids are arranged in stacks called grana.The chloroplast matrix is called the stroma and contains enzymes that catalyse the light-independent reactions of photosynthesis. But stroma is not the site for light reactions. Stromal lamellae connect two or more grana to each other. In this way, the lamellae act as a skeleton of the chloroplast, maintaining efficient distances between the grana, thereby maximising the overall efficiency of the chloroplast. Dark reaction does not depend directly on the presence of light but is dependent on the products of light reaction i.e., ATP and NADPH. The dark reaction occurs through the Calvin cycle.