How many meiotic divisions will be necessary to produce two hundred pollen grains?

The correct option is A 50
During sexual reproduction in angiosperms, meiosis occurs in microspore and megaspore mother cells. Microspore mother cell is a diploid cell which after meiosis forms a tetrad of microspores, all of which are functional and produce four microspores or pollen grains. Hence, to produce 200 pollen grains, 50 meiotic divisions are required in 50 microspore mother cells.