{"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 identifying which compound among the given options does not exhibit tautomerism and which one shows optical isomerism. The correct answer identifies benzoquinone as the compound that does not show tautomerism and methyl 2-hydroxypropanoate as the compound that exhibits optical isomerism."}