The correct answer is Option (4)- Central cell
Explanation:
- In a mature embryo sac (female gametophyte) of angiosperms, the largest cell is the central cell.
- The central cell contains two polar nuclei, which later fuse with a male gamete during double fertilization to form the triploid endosperm (3n).
- It is large because it stores nutrients and cytoplasmic reserves for the developing embryo.
Other options:
Synergids – Small cells near the egg cell, assisting in pollen tube guidance.
Antipodal cells – Small cells at the chalazal end, often degenerating after fertilization.
Egg cell – Smaller than the central cell, it fuses with a male gamete to form the zygote (2n).
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