{"knowledge_schema": {"broad_category": "Chemistry \u2192 Organic Chemistry \u2192 Isomerism", "refinement": "This problem focuses on the classification of isomers, specifically tautomerism and optical isomerism, within organic compounds.", "specific_scope": "The task involves identifying which compound does not exhibit tautomerism and which compound shows optical isomerism among the given options.", "goal": "Determine the correct pairs of compounds based on their isomeric properties."}, "summary": "This problem involves understanding isomerism in organic chemistry, specifically identifying compounds that do not exhibit tautomerism and those that show optical isomerism. Tautomerism refers to the ability of compounds to exist in different forms that can interconvert, while optical isomerism involves compounds that can exist as non-superimposable mirror images. The goal is to analyze the given compounds and select the correct pairs based on these properties."}