Which one of the following statements is/are correct?
$I.$ Frenulum is the fold by which the tongue is attached to the floor of the mouth or oral cavity.
$II.$ The lower surface of the tongue has small projections which bear taste buds.
$III.$ The pharynx is the common passage for food and air.
$IV.$ The sphincter of Oddi guards and regulates the opening of the stomach into the duodenum.
$V.$ The colon is divided into an ascending,a transverse,a descending part,and a sigmoid colon.

• A
  $I, II$ and $III$ are correct.
• B
  $IV$ and $V$ are correct.
• C
  $I, II, III, IV$ and $V$ are correct.
• D
  $I, III$ and $V$ are correct.