Is a cable is to be designed for use on 1000 kV, which insulation would you prefer?

Q. Is a cable is to be designed for use on 1000 kV, which insulation would you prefer?

A.            Polyvinyle chloride

B.            Vulcanised rubber

C.            Impregnated paper

D.            Compressed SFe gas

Answer: Compressed SFe gas