The correct option is D All of the above
Sperm is the male gamete, produced in the testis of a male, while Ovum is the female gamete, produced in the ovary of a female. Sperm is motile in nature and ovum is nonmotile in nature. From a genetic point of view, each gene stands an equal chance of ending up in sperm but has a 50% chance of being discarded in the polar body in egg production. They have a different allocation of a cellular food supply.
So the correct option is 'all of the above'.