<prompt> Fertilization is complete when -1st Polar body is formed2nd Polar body is formedPrimary oocyte is formedSecondary oocyte is formed  <response>: Ans. is b i.e., 2nd Polar body is formed As soon as a spermatozoon enters the ovum, the lather finishes its second meiotic division and the second polar body is formed - I.B. Singh 