Which of the following statement is correct?

Hydrolysis of dialkyl dichloro silane produces cross linked silocone polymer

Organo silicon polymers are known as silicones

Hydrolysis of alkyl trichloro silane produces cross linked silicone polymer 

Silicones have the general formula ${\left({\mathrm{R}}_2\mathrm{SiO}\right)}_{\mathrm{n}}$ where R is ${\mathrm{CH}}_3,{\mathrm{C}}_2{\mathrm{H}}_5,{\mathrm{C}}_6{\mathrm{H}}_5$ etc