The membrane surrounding the secondary oocyte is called-

The correct answer is Option (4) → Zona pellucida   

Ovulation is a phase in the menstrual cycle when your ovary releases an egg (ovum). Once an egg leaves your ovary, it travels down your fallopian tube where it waits to be fertilized by sperm. On average, it happens on day 14 of a 28-day menstrual cycle .The secondary oocyte forms a new membrane called zona pellucida surrounding it.