In the plants, there are 50 or more thylakoids piled upon each other to form?

Explanation

The correct answer is Granum. In plants, thylakoids are organized into stacks called grana, which are essential for the light-dependent reactions of photosynthesis. These reactions occur in the thylakoid membranes, where light energy is converted into chemical energy. The other options are incorrect: a Centrosome is found in animal cells, not plant cells; the Stroma is the fluid surrounding the thylakoids in chloroplasts, not a stack of them; and Multinucleate refers to cells with multiple nuclei, which is unrelated to thylakoid organization.