Stroma is the space between the grana in a chloroplast. The correct option is A.
What is a chloroplast?
A chloroplast is an organelle found inside the cells of plants and certain algae that is responsible for photosynthesis, which is the process by which solar energy is converted into chemical energy for growth.
Chloroplasts are oval in shape with two membranes: an outer and an inner membrane. The stroma, or dense fluid within the chloroplast, is the space within the inner membrane which contain grana.
Thus, the correct option is A.
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