{"knowledge_schema": {"broad_category": "Chemistry \u2192 Organic Reactions \u2192 Rearrangement Reactions", "refinement": "This problem specifically deals with the Pinacol-Pinacolone rearrangement, which involves the transformation of a pinacol compound into a ketone under acidic conditions.", "specific_scope": "The task is to identify the starting materials (A) and products (B) of the given reactions based on the Pinacol-Pinacolone rearrangement mechanism.", "goal": "Determine the correct structures of the starting materials and products for the specified reactions."}, "summary": "The problem involves understanding the Pinacol-Pinacolone rearrangement, a chemical reaction where a pinacol compound is converted into a ketone under acidic conditions. The task is to identify the correct starting materials and products for two reactions involving this rearrangement. The candidates provided include different structural formulas for the starting material (A) and the product (B). The goal is to select the correct pair that accurately represents the reaction outcomes based on the rearrangement mechanism."}