If an organic compound, Q, is reacted with phosphorus pentachloride, fumes of hydrogen chloride are released. When Q is heated with acidified aqueous potassium dichromate(VI), the solution changes to green. What is Q?
- A$\text{CH}_3\text{CH}_2\text{CHO}$
- B$\text{CH}_3\text{CH}_2\text{CO}_2\text{H}$
- C$\text{CH}_3\text{CH(OH)CH}_3$
- D$\text{(CH}_3)_3\text{COH}$