The pituitary gland is located in a bony cavity called $A$ and is attached to $B$ by a stalk. Identify $A$ and $B$ to complete the given statement.

• A
  $A$-sella turcica; $B$-midbrain
• B
  $A$-sella turcica; $B$-forebrain
• C
  $A$-sella turcica; $B$-hypothalamus
• D
  $A$-sella turcica; $B$-pineal