Statement $(A)$: The Caspian tiger, a subspecies of tiger, is one of the recently extinct animals.
Reason $(R)$: The colonization of tropical Pacific islands by humans.

• A
  Statement $(A)$ is wrong but Reason $(R)$ is right.
• B
  Statement $(A)$ and Reason $(R)$ both are true but $(R)$ is not the correct explanation of $(A)$.
• C
  Statement $(A)$ is right but Reason $(R)$ is wrong.
• D
  Statement $(A)$ and Reason $(R)$ both are true, $(R)$ is the correct explanation of statement $(A)$.