The correct options are
A greases
B water proof fabrics
C electrical insulators
Silicones have various applications.
Some of them include,
(A) Use as electrical insulators.
Silicon resins are mixed with glass fibre for additional strength and are used for coating electrical wires to give water proof and high temperature insulation.
(B) Water proof fabrics.
Monomers of alkyl silicone chlorides form water resistant coating on glass, cloth paper etc.
(D) Greases.
Silicones have high viscosity.
Hence, they are used as greases.