In which of these reactions is a coloured organic product formed? 1 ethanal + $2,4$-dinitrophenylhydrazine reagent 2 ethanol + acidified potassium dichromate(VI) 3 ethene + cold dilute acidified potassium manganate(VII)
- A1, 2 and 3 are correct
- B1 and 2 only are correct
- C2 and 3 only are correct
- D1 only is correct