If there are 4 cells in an anther, what will be the number of pollen grains?

$\begin{array}{l}\text{1 microspore mother cell\hspace{0.33em}}\stackrel{\text{meiotic\hspace{0.33em}division}}{\to }4\text{\hspace{0.33em}haploid microspores or pollen grains}\\ \text{4 microspore mother cells = 4 }\times \text{ 4pollen grains}\\ \text{= 16 pollen grains.}\end{array}$