Answer: Menstrual cycle is present in all primates — Menstrual cycles are characteristic of primates and a few other mammals. Most mammals exhibit an estrous cycle rather than a menstrual cycle, making option B the correct statement.

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Which is correct ?

Menstrual cycle is present in all mammals

Menstrual cycle is present in all primates

Estrous cycle occurs in all mammals

Most mammals are ovoviviparous

Onset of pregnancy

Yellow corpus luteum occurs in a mammals in

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