Which of the following is primary allylic alcohol?

Step-by-step solution

A primary allylic alcohol requires that the hydroxyl group is attached to a carbon adjacent to a carbon-carbon double bond (allylic) and that the hydroxyl-bearing carbon is only attached to one other carbon (primary). Option A : H₂ C=CH-CH(CH₃)-OH is allylic and secondary. Option C : H₂ C=CH-C(CH₃)₂ -OH is allylic and tertiary. Option D : CH₃ -CH=CH-CH(CH₃)-OH is allylic and secondary. Option B : H₂ C=CH-CH₂ -OH is allylic since the CH₂ group is adjacent to the double bond, and primary as the hydroxyl-bearing carbo