$A -$ Events after the formation of zygote are called post-fertilization events.
$R -$ In viviparous animals,a young one develops outside the mother's body.
$R -$ In viviparous animals,a young one develops outside the mother's body.
- A$A$ and $R$ are correct.
- B$A$ and $R$ are incorrect.
- C$A$ is correct,$R$ is incorrect.
- D$A$ is incorrect,$R$ is correct.
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