A=Benzyl alcohol,B=Benzyl cyanide
A=Benzyl alcohol,B=Benzyl isocyanide
A=Benzyl chloride,B=Benzyl cyanide
A=Benzyl chloride,B=Benzyl isocyanide
The question is incomplete as the reaction is not provided. Therefore, it's impossible to determine the compounds A and B without knowing the reaction scheme. To solve this, the reaction needs to be shown, and then the products A and B can be identified based on the reaction mechanism and the reactants involved.