Assertion $A :$ Colostrum provides passive immunity to the infant.
Reason $R :$ Colostrum secreted by the mother contains antibodies that protect the infant.

• A
  $A$ is correct but $R$ is not correct.
• B
  $A$ is not correct but $R$ is correct.
• C
  Both $A$ and $R$ are correct and $R$ is the correct explanation of $A.$
• D
  Both $A$ and $R$ are correct but $R$ is $\text{NOT}$ the correct explanation of $A.$