Read the following statements carefully :
$(A)$ $A$ secondary alcohol on oxidation gives a ketone
$(B)$ Ethanol reacts with conc. $H_2SO_4$ at $180\,^{\circ}C$ to yield ethylene
$(C)$ Methanol reacts with iodine and sodium hydroxide to give a yellow precipitate of iodoform
$(D)$ Hydrogen gas is liberated when sodium is added to alcohol. Select the correct statements from the above set:

• A
  $A, B$
• B
  $C, D$
• C
  $A, B, D$
• D
  $A, C, D$