{"knowledge_schema": {"broad_category": "Chemistry \u2192 Organic Chemistry \u2192 Reactions and Reagents", "refinement": "This problem involves identifying suitable reagents for specific organic reactions, focusing on nucleophilic addition and hydrolysis.", "specific_scope": "The first reaction involves the addition of cyanide to a ketone, while the second reaction involves the hydrolysis of a nitrile to a carboxylic acid.", "goal": "Select the correct reagents (A and B) that facilitate the specified transformations in the reactions."}, "summary": "In this problem, we need to identify appropriate reagents for two organic reactions. The first reaction involves the conversion of butan-2-one to 2-hydroxy-2-methylbutanenitrile using a reagent that can facilitate nucleophilic addition, while the second reaction requires a reagent that can hydrolyze the nitrile to a carboxylic acid. The goal is to select the correct pairs of reagents from the provided candidates that will successfully carry out these transformations."}