{"knowledge_schema": {"broad_category": "Chemistry \u2192 Organic Chemistry \u2192 Isomerism", "refinement": "This problem focuses on the classification of isomers, specifically identifying compounds that exhibit tautomerism and optical isomerism.", "specific_scope": "The task involves analyzing specific compounds to determine which does not show tautomerism and which exhibits optical isomerism.", "goal": "Identify the correct pairs of compounds based on their isomeric properties."}, "summary": "This problem involves understanding isomerism in organic chemistry, specifically distinguishing between tautomerism and optical isomerism. The task requires evaluating two sets of compounds: one to determine which does not exhibit tautomerism and another to identify which compound shows optical isomerism. The goal is to select the correct options from the provided candidates based on these properties."}