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Egg of Cycas (Gymnosperms) and its nucleus are the largest in the plant kingdom.

1. Egg of Cycas are also the largest in the plant kingdom.
2. The sperms of Cycas are the largest in the plant kingdom reaching a size of 300 mm. Egg of Cycas and its nucleus are also the largest in the plant kingdom.
3. Seed habit originated in Cycadophytes or pteridosperms.
4. Sunken stomata is the characteristic feature of xerophytes which help in reducing loss of water from leaf surface. These type of stomata are found in Oleander or pine.

Correct answer: The sperms of Cycas are the largest in the plant kingdom reaching a size of 300 mm. Egg of Cycas and its nucleus are also the largest in the plant kingdom.

Solution

The correct choice is the one that states both facts accurately: Cycas has the largest sperm in the plant kingdom, and its egg and nucleus are also exceptionally large. The other options either repeat the egg claim incorrectly or shift to unrelated/general plant features.

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