$P$ - The nervous system that relays impulses from the $CNS$ to skeletal muscles.
$Q$ - The nervous system that transmits impulses from the $CNS$ to involuntary organs and smooth muscles of the body.
$\quad\quad\quad P \quad\quad Q$

• A
  Autonomic Neural System $\quad$ Somatic Neural System
• B
  Somatic Neural System $\quad$ Autonomic Neural System
• C
  Sympathetic Neural System $\quad$ Parasympathetic Neural System
• D
  Parasympathetic Neural System $\quad$ Sympathetic Neural System