By using a test with alkaline aqueous iodine, which of the following pairs of compounds can be told apart? 1 butanal and butanone 2 pentan-$2$-one and pentan-$3$-ol 3 propanone and propan-$2$-ol
- A1, 2 and 3 are correct
- B1 and 2 only are correct
- C2 and 3 only are correct
- D1 only is correct