Answer: Granum
Explanation:
The stacks of thylakoids are known as granum. Thylakoids are membrane bound embedded in the chloroplast stroma.
It appears like a stack of coin. This compartments are located in the chloroplast and cynobacteria.
They are the main site for the light dependent reactions of the photosynthesis. The carbon dioxide and water is used during this process and carbohydrates is formed as the main product and oxygen is released as by product.
