During conjugation in Paramecium

• A

  Out of the four micronuclei formed, three nuclei degenerate

• B

  Out of the twelve macronuclei formed, four nuclei degenerate

• C

  Zygote nucleus undergoes eight successive divisions in each conjugant

• D

  Out of the sixteen nuclei formed from zygote, $12$  become macronuclei and  $4$   micronuclei