In Oppenauer's oxidation,

• A

  secondary alcohol is oxidised to carboxylic acid in acetone solvent using aluminium tertiary butoxide
• B

  secondary alcohol is oxidised to carboxylic acid without affecting the $\mathrm{C}=\mathrm{C}$ or $\mathrm{C} \equiv \mathrm{C}$ bond by aluminium tertiary butoxide in acetone solvent
• Correct answer
  C

  secondary alcohol is oxidised to ketone without affecting $\mathrm{C}=\mathrm{C}$ or $\mathrm{C} \equiv \mathrm{C}$ bond by aluminium tertiary butoxide
• D

  secondary alcohol is oxidised to ketone by chromic acid - pyridine complex.

Solution

In Oppenauer's oxidation, secondary alcohol is oxidised to corresponding ketone in the presence of aluminium tertiary butoxide. Other oxidisable groups are not affected.

Hence, the correct answer is option: 'C'.