The diagram represents Miller's experiment. Choose the correct combination of labelling.

• A

  $A$-electrodes, $B$-$N{H_3} + {H_2} + {H_2}O + C{H_4},$$C$-cold water, $D$-vacuum, $E-U$ trap

• B

  $A$-electrodes, $B$-$N{H_4} + {H_2} + C{O_2} + C{H_3},$$C$-hot water, $D$-vacuum, $E-U$ trap

• C

  $A$-electrodes, $B$-$N{H_3} + {H_2}O$, $C$-hot water, $D$-tap, $E-U$ trap

• D

  $A$-electrodes, $B$-$N{H_3} + {H_2} + {H_2}O + C{H_4}$, $C$-steam, $D$-vacuum, $E-U$ trap