When a male ejaculates sperms during coitus,for normal fertility,at least ....... percent of sperms must have normal shape and size,and at least ........... percent of them must show vigorous motility.

  • A
    $40, 60$
  • B
    $50, 50$
  • C
    $60, 40$
  • D
    $52, 48$

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