The correct answer is option C, A haploid cell formed in the female ovary
Reason -
All gametes (male or female sex cell including both egg and sperm) are haploid cells. These cells carry one copy of each chromosome which enter into cell division phase and there they produce diploid cells. The female sex cell develops in the ovary and after fertilization with sperm moves to get implanted in the uterus. Thus, Option C is correct as egg is produced in ovary (not uterus) and it is haploid.