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B
Cycas
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C
Gnetum
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D
Mango
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Solution
The correct option is BCycas The gymnosperms are heterosporous plants with microspores or pollen grains producing male gametophyte and the single megaspore within megasporangium (nucellus) developing into a female gametophyte. However, the male gametes ofCycas are multi-flagellate or multi-ciliate and very large.