The correct option is C 16
Meiosis is a specialized type of cell division which reduces the chromosome number by half. This process occurs in all sexually reproducing eukaryotes including animals, plants, and fungi. In meiosis, DNA replication is followed by two rounds of cell division to produce four daughter cells with half the number of chromosomes as the original parent cell. The two meiotic divisions are known as meiosis I and meiosis II. Meiosis occurs in germ cells. So, 16 spore mother cells required to produce 64 spores as, meiotic division yields 4 cells at a time. Thus, option A is correct.