The chloroplast thylakoids are in the form of.

Correct option is D

• The thylakoids in chloroplasts are organized into stacked discs called grana. These stacks of thylakoids are embedded in a matrix called the stroma. The thylakoids contain the pigment chlorophyll, which plays a key role in the process of photosynthesis by capturing light energy.

• Thylakoids are membrane-bound structures found within the chloroplasts of plant cells, and they are essential for the light-dependent reactions of photosynthesis.
• The stacks of thylakoids are called grana (plural of granum), and they are connected by stroma lamellae (unstacked regions of the thylakoid membrane).
• The thylakoid membranes contain various proteins, enzymes, and pigments, including chlorophyll, which absorb light energy for photosynthesis.
• The light-dependent reactions of photosynthesis occur in the thylakoid membranes, while the Calvin cycle (light-independent reactions) occurs in the stroma.
• The grana structure enhances the surface area for the light reactions, allowing more chlorophyll to capture light and produce energy-rich molecules like ATP and NADPH.
  

• Interconnected sacs: This would describe a network, but thylakoids are specifically stacked rather than merely interconnected in sacs.
• Independent discs: Thylakoids are not independent; they are arranged into stacks called grana, with some connections between them.
• Interconnected tubules: Thylakoids are flat and disc-shaped.