Statement-$1$: Heartwood is more durable and resistant to the attacks of microorganisms and insects compared to sapwood.
Statement-$2$: Heartwood contains organic compounds like oils,aromatic substances,gums,resins,tannins,and phenols.

• A
  Statement-$1$ is false,Statement-$2$ is true.
• B
  Statement-$1$ is true,Statement-$2$ is true. Statement-$2$ is the correct explanation of Statement-$1$.
• C
  Statement-$1$ is true,Statement-$2$ is false.
• D
  Statement-$1$ is true,Statement-$2$ is true. Statement-$2$ is not the correct explanation of Statement-$1$.