In which of the following mammals the menstrual cycle occur?

The correct answer is Option (1) → Apes

The menstrual cycle is the reproductive cycle of female primates: monkeys, apes and human beings. Other female mammals have an oestrous cycle instead, in which the uterine lining is reabsorbed and there is no menstrual bleeding.

Option (1) Apes — Correct. The menstrual cycle occurs only in primates, such as monkeys, apes and human beings. Other mammals, such as cows, dogs and tigers, have an oestrous cycle instead.

Option (2) Dogs — Incorrect. Dogs are not primates; they have an oestrous cycle.

Option (3) Rats — Incorrect. Rats are non-primate mammals with an oestrous cycle.

Option (4) Sheep — Incorrect. Sheep also have an oestrous cycle; they breed in a particular season.

NCERT Extract:
Menstrual Cycle – “… The reproductive cycle in the female primates (e.g. monkeys, apes and human beings) is called menstrual cycle. The first menstruation begins at puberty and is called menarche. In human females, menstruation is repeated at an average interval of about 28/29 days, and the cycle of events starting from one menstruation till the next one is called the menstrual cycle.”