Identify the endocrine glands $P, Q,$ and $R$ in the given figure.
$\quad\quad\quad P \quad\quad\quad Q\quad\quad\quad R$

• A
  Pituitary $\quad$ Hypothalamus $\quad$ Adrenal
• B
  Hypothalamus $\quad$ Pituitary $\quad$ Pancreas
• C
  Hypothalamus $\quad$ Pineal $\quad$ Pancreas
• D
  Hypothalamus $\quad$ Pineal $\quad$ Adrenal