The moderator used in nuclear reactor is (UP CPMT 2014)

D2O is used as moderator in nuclear reactor. Uses of other given options are as follows: (a) TEL (tetraethyl lead) is used as antiknock agent in petrol engine. (c) H2O2 is used for bleaching delicate articles like wood chair. It is also used as an antiseptic and germicide. (d) R––O––R (ether) is used as a solvent.