Statement $P$: The various types of biochemical reactions occurring in every cell of a living organism are collectively called metabolism.
Statement $Q$: Growth occurs when the rate of anabolic processes is greater than the rate of catabolic processes.

• A
  Both Statement $P$ and Statement $Q$ are incorrect.
• B
  Both Statement $P$ and Statement $Q$ are correct.
• C
  Statement $Q$ is the correct explanation of Statement $P$.
• D
  Statement $P$ is correct and Statement $Q$ is incorrect.