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Q. The duration 19-21 days refers to
  • (A) incubation period of hen's egg
  • (B) average life-span of a red blood cell in humans
  • (C) the period of menstrual cycle soon after menstruation, during which fertilisation is most likely to occur
  • (D) period of completion of one schizogony cycle of malarial parasite inside a red blood cell
✅ Correct Answer: (C) the period of menstrual cycle soon after menstruation, during which fertilisation is most likely to occur

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Krishna Sharma
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