{"knowledge_schema": {"broad_category": "Chemistry \u2192 Organic Chemistry \u2192 Isomerism", "refinement": "This problem involves understanding the concepts of tautomerism and optical isomerism in organic compounds.", "specific_scope": "The task is to identify which compound does not exhibit tautomerism and which compound displays optical isomerism among the given options.", "goal": "Determine the correct compounds based on their structural properties related to tautomerism and optical isomerism."}, "summary": "In this problem, we are tasked with identifying a compound that does not exhibit tautomerism and determining which of two compounds displays optical isomerism. Benzoquinone does not exhibit tautomerism due to its stable structure, while methyl 2-hydroxypropanoate displays optical isomerism because it has a chiral center. Therefore, the answer is A = Benzoquinone, B = Methyl 2-hydroxypropanoate."}