4, Human sperm cell has 23 chromosomes & human nerve cell has 46 chromosomes. This is due to the reason that:-
A, Nerve cell diploid C, Nerve cell is haploid
B, Sperm cell is diploid D, sperm cell is triploidn

Answer :

Nerve cell diploid

Explanation:

all the common cells of our body divides by the process of mitosis hence they are diploid ( having same number of chromosomes )

but sperm cell is a gamete formed by meiosis hence the the number of chromosomes get half hence they are haploid cells.

haploid cells;

x would be the most and the least would be y because there are more fruit   and seeds than flock z has insects