Light reaction occurs in the _ of chloroplast:

Explanation

Option C is correct.The light reaction occurs in the grana of the chloroplast. The chloroplast is a specialized organelle in plant cells that is responsible for photosynthesis. Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to produce oxygen and sugar. The chloroplast is divided into two parts: the stroma and the thylakoids. The stroma is a gel-like fluid that contains the enzymes needed for the Calvin cycle, the second stage of photosynthesis. The thylakoids are a series of flattened sacs that are stacked together to form grana. The light reaction occurs in the thylakoids of the chloroplast. The thylakoids contain chlorophyll, a green pigment that absorbs sunlight. The sunlight energy is used to split water molecules into hydrogen and oxygen. The hydrogen atoms are used to produce NADPH, a molecule that stores energy. The oxygen atoms are released into the atmosphere. The products of the light reaction, NADPH and ATP, are used in the Calvin cycle to produce sugar. The other options are not parts of the chloroplast where the light reaction occurs: The outer membrane is a thin membrane that surrounds the chloroplast. It protects the chloroplast from the outside environment. The inner membrane is a thicker membrane that surrounds the stroma. It controls the movement of molecules into and out of the chloroplast. The stroma is the gel-like fluid that contains the enzymes needed for the Calvin cycle.