Answer
d. they have the same number of chromosomes
Work Step by Step
Spermatozoids are much more produced than ova, motility of sperm is greater than motility of ova. A single egg is 10 million times the volume of a sperm cell and ova is the biggest cell in the human body and sperm cell is the smallest. They both have 23 chromosomes, together they built zygote with 46 chromosomes.