The statement/s which are true about antagonists from the following is/are :-
$A.$ They bind to the receptor site.
$B.$ Get transferred inside the cell for their action.
$C.$ Inhibit the natural communication of the body.
$D.$ Mimic the natural messenger.
Choose the correct answer from the options given below :-

• A
  $B$ only
• B
  $A, C$ and $D$
• C
  $A$ and $B$
• D
  $A$ and $C$