Insufficient structural information for compounds T and U

Steps:

• Review choices to identify dependencies on molecular structures or functional groups.
• Note absence of formulas or descriptions for T and U in the query.
• Evaluate that all options require specific properties (e.g., stereochemistry, reactivity, oxidation products) tied to unknown identities.
• Conclude analysis impossible without additional details.

Why B is correct:

• Not enough information to confirm; aqueous iodine typically tests for unsaturation via decolorization, but T and U's features are unspecified.

Why the others are wrong:

• A: Stereoisomers require identical connectivity and molecular formula, unverifiable without structures.
• C: Reduction selectivity (LiAlH4 vs. NaBH4) depends on functional groups like carboxylic acids, unknown here.
• D: Oxidation of 3-methylbutan-1-ol yields 3-methylbutanoic acid, but U's identity is ambiguous.

Final answer: Not enough information.