If at the end of meiosis the 4 daughter cells produced have 20 chromosomes each, how many chromosomes would have been present in the mother cell from which these daughter cells are formed?

The correct option is C $40$
Since , we are aware about the fact that meiosis is a reductional division because number of chromosome gets reduced to half in daughter cell as compared to mother cell . Here, specified chromosome in daughter cell is 20 after meiosis thus, the mother cell was having double the number of chromosomes i.e., 40.

So, correct answer is option C.