{"knowledge_schema": {"broad_category": "Chemistry \u2192 Organic Chemistry \u2192 Stereochemistry and Reduction Reactions", "refinement": "This problem involves understanding the stereochemistry of carbonyl compounds and their reduction using different reducing agents.", "specific_scope": "The focus is on identifying the correct starting materials for two reduction reactions that yield specific chiral alcohols from carbonyl compounds.", "goal": "Determine the correct pair of carbonyl compounds that, when reduced by the specified agents, produce the given chiral alcohols."}, "summary": "This problem is rooted in organic chemistry, specifically in the area of stereochemistry and reduction reactions. It requires identifying the correct starting materials for two carbonyl compounds that, when reduced by sodium borohydride (NaBH4) and lithium aluminum hydride (LiAlH4), yield specific chiral alcohols. The goal is to match the correct stereochemistry of the starting materials to the products formed in the reactions. The correct answer is that C is (R)-3-methyl-2-pentanone and D is (S)-3-methyl-2-pentanone."}