Which of the following statements is correct?
- A2,2-dimethylpropanoic acid is an isomer of propyl methanoate.
- B2-methylbutan-2-ol is an isomer of hexan-3-ol.
- C3-methylbutan-2-one is an isomer of pentanal.
- D3,3-dimethylbutan-2-one is an isomer of pentan-3-one.