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Ram Sharma • 193.84K Points
Coach Biology 

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 - Option(C)

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