$S$ - Statement: Dairy products provide nutrition to humans.
$R$ - Reason: $A$ mule is a cross between a male horse and a female donkey.

• A
  $S$ and $R$ both are true,and $R$ is the correct explanation of $S$.
• B
  $S$ and $R$ both are true,but $R$ is not the correct explanation of $S$.
• C
  $S$ is true and $R$ is false.
• D
  $S$ is false and $R$ is true.