Assertion $(A)$: Botanical gardens and zoological parks are $ex-situ$ conservation approaches.
Reason $(R)$: Botanical gardens and zoological parks are located within museums.
Which option is correct for Assertion $(A)$ and Reason $(R)$?

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