The correct answer is Option (3) → Megaspore
Based on the structures listed, Megaspore is the odd one out.
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Tapetum, Microspore, and Generative cell are all directly related to the male reproductive parts of a flowering plant. The tapetum nourishes the microspores (which are young pollen grains), and the generative cell is a key component inside the mature pollen grain.
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Megaspore, on the other hand, is the spore that develops into the female gametophyte (embryo sac) within the ovule of the flower.
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