The correct statement is 

 (A) Cyclohexadiene and cyclohexene cannot be isolated with ease during controlled hydrogenation of benzene.

 (B) One mole each of benzene and hydrogen when reacted gives 1/3 mole of cyclohexane and 2/3 mole unreacted hydrogen.

(C) Hydrogenation of benzene to cyclohexane is an endothermic process.

(D) It is easier to hydrogenate benzene when compared to cyclohexene 

The correct statement is 

  (A) Cyclohexadiene and cyclohexene cannot be isolated with ease during controlled hydrogenation of benzene.

  (B) One mole each of benzene and hydrogen when reacted gives 1/3 mole of cyclohexane and 2/3 mole unreacted hydrogen.

  (C) Hydrogenation of benzene to cyclohexane is an endothermic process.

  (D) It is easier to hydrogenate benzene when compared to cyclohexene