The correct option is A A – electrodes, B – NH3+H2+H2O+CH4, C – cold water, D – Vacuum, E – U Trap.
In Urey and Miller experiment the set up labelled as A is electrodes in spark discharge chamber, B is the mixture gases conatining NH3+H2+H2O+CH4, C is the condenser, D is Vacuum pump , E is the U Trap. where the liquid containing chemical compund is collected.