In the mass spectrum of compound J, the ratio of the height of the $\text{M}+1$ ion peak to the height of the $\text{M}^+$ ion peak is $4:91$. On heating with acidified $\text{K}_2\text{Cr}_2\text{O}_7$, compound J is changed into a carboxylic acid. Identify compound J.
- Abutanal
- Bbutanone
- Cpropan-1-ol
- Dpropanenitrile