Silicones are group of organo silicon polymer , Select correct statement(s) about them,a) R3SiCl produce very complex cross linked polymeric silicones on Hydrolysis        b) Their water repellency arises because silicone chain is surrounded by organic side groupsc) Their strength and inertness are related to the stable silica like skeleton of  d) Hydrolysis product of CH3SiCl3will  block the end of the straight chain produce by hydrolysis of CH32 SiCl 2