Compound Y is warmed with acidified potassium dichromate(VI). The organic product formed then produces an orange precipitate with $2,4$-dinitrophenylhydrazine reagent, but it does not produce a silver mirror with Tollens’ reagent. What is Y?
- Abutan-1-ol
- Bbutan-2-ol
- Cbutanal
- D2-methylpropan-2-ol