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Assertion: Cow,sheep and rats are non-pr...

Assertion: Cow,sheep and rats are non-primate mammals exhibiting oestrous cycle.
Reason: Deer,dog and tiger are primate mammals exhibiting menstrual cycle.

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The correct Answer is:
C
The females of placental mammals exhibit cyclical changes in the activities of ovary and accessory ducts as well as hormones during the reproductive phases.
In non-primate mammals like cows, sheep, rats, deers,dogs ,tiger etc., cyclical chnages during reproduction are called oestrus cycle where as in primates (monkeys,apes and humans) it is called menstrual cycle.
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