Which of the following are the starting materials for the Grignard synthesis of tert-butanol?

CH3MgBr  + CH3COCH3 CH3CH2MgBr  +  CH3COCH3 CH3MgBr  +   CH3CH(OH)CH3 CH3MgBr  +  (CH3)3CH3

CH3MgBr  + CH3COCH3

Tertiary alcohols are prepared by the reaction of a Grignard reagent with a ketone followed by acid hydrolyis.