Average fertile life of an egg

Answer: Option A

Average fertile life of an egg is 12 - 24 hours.
Sperm can live inside a woman's body for less than 5 days. A released egg lives for less than 24 hours. The highest pregnancy rates have been reported when the egg and sperm join together within 4 to 6 hours of ovulation.
The egg moves down the fallopian tube and stays there for 12 to 24 hours, where it can be fertilized. Sperm can live inside the female reproductive tract for as long as five days after sexual intercourse under the right conditions.