IR spectrum identifies functional groups in compound L

Steps:

• Examine IR peaks for O-H stretch (broad, 3200-3600 cm⁻¹) indicating alcohol or carboxylic acid.
• Look for C=O stretch (1700-1750 cm⁻¹) suggesting carbonyl group like acid or ketone.
• Check for absence of other features like sharp O-H for non-hydrogen bonded alcohols.
• Match combination to compounds with both alcohol and carboxylic acid.

Not enough information: IR spectrum not provided, preventing definitive analysis.

Why C is correct:

• 3-Hydroxypropanoic acid shows broad O-H from COOH, C=O at ~1710 cm⁻¹, and alcohol O-H.

Why the others are wrong:

• A: Ketone C=O (~1715 cm⁻¹) and two alcohols, but no COOH broad O-H.
• B: Diol with only broad O-H, no C=O.
• D: COOH with broad O-H and C=O, but shorter chain lacks expected alcohol C-O stretch pattern.

Final answer: C