Stream of chloroplasts carries the fixation of:

Explanation

Chloroplasts are the site of photosynthesis in plant cells, where carbon dioxide (CO2) is fixed into organic molecules. The process involves light-dependent reactions in the thylakoid membranes and light-independent reactions in the stroma. The enzyme Rubisco facilitates the fixation of CO2 into glucose during the Calvin Cycle.Option A (Nitrogen): Nitrogen fixation is carried out by specialized bacteria, not chloroplasts.Option B (Oxygen): Oxygen is released as a byproduct of photosynthesis, not fixed.Option C (Carbon monoxide): Carbon monoxide is not involved in the photosynthetic process and is harmful to plants.