The correct option is
A CH2−CH=CH−R|CH−OH and
CH2−C|RH−CH2−CHOA and B are shown in the above reaction.CH3−CH=CH−O||C−HRMgX/THF/NH4Cl−−−−−−−−−−−−−→CH3−CH=CH−R|CH−OH
CH3−CH=CH−O||C−HH+−−→CH3−+CH−CH2−O||C−HRMgX/THF−−−−−−−−→CH3−R|CH−CH2−O||CH
or
CH3−CH=CH−O||C−HRMgX/THF/HCl−−−−−−−−−−−→CH3−R|CH−CH2−O||C−H
Option A is correct.