How can the following compounds be differentiated using IR spectroscopy?

• A. A: Strong and broad peak at 3300 cm⁻¹; no peak between 1680-1600 cm⁻¹. B: No peak at 3300 cm⁻¹; no peak between 1680-1600 cm⁻¹. C: No peak at 3300 cm⁻¹; medium intensity peak between 1680-1600 cm⁻¹.
• B. A: No peak at 3300 cm⁻¹; no peak between 1680-1600 cm⁻¹. B: No peak at 3300 cm⁻¹; medium intensity peak between 1680-1600 cm⁻¹. C: Strong peak at 3300 cm⁻¹; strong peak between 1680-1600 cm⁻¹.
• C. A: No peak at 3300 cm⁻¹; medium peak between 1680-1600 cm⁻¹. B: No peak at 3300 cm⁻¹; No peak between 1680-1600 cm⁻¹. C: Strong and broad peak at 3300 cm⁻¹; No peak between 1680-1600 cm⁻¹.
• D. A: Strong and broad peak at 3300 cm⁻¹; no peak between 1680-1600 cm⁻¹. B: Strong and broad peak at 3300 cm⁻¹; medium intensity peak between 1680-1600 cm⁻¹. C: No peak at 3300 cm⁻¹; No peak between 1680-1600 cm⁻¹.

Answer: (D)