How many pollen grains and how many mitotic divisions are required to produce 100 male gametes?

The correct option is B 50 Pollen grains and 100 mitotic divisions

• One pollen grain undergoes 2 mitotic divisions to produce 2 male gametes.
• 1st mitotic division gives rise to vegetative cell and generative cell.
• Generative cell undergoes 2nd mitotic division to produce 2 male gametes.

So, to produce 100 male gametes, 50 pollen grains and 100 mitotic divisions are required.