What is the life cycle of a antelope?

The gestation period of the pronghorn is 245 to 255 days, after which, the female gives birth to 1 or mostly 2 babies. The juveniles attain their full weight within 4½ years. The newborns, being the most vulnerable to predators, spend their first 3-4 weeks hiding under vegetation. The females nurse their babies about thrice a day, lead them to sources of food and water, guard them against predators, interacting with them for about 20-25 minutes every day. The baby pronghorns depend on their mothers’ milk until they attain the age of weaning at 4 or 5 months.

The answer is option a.