Alcohol U is reacted with hot acidified $\text{K}_2\text{Cr}_2\text{O}_7$ solution. The resulting organic product contains $58.8\%$ C, $9.8\%$ H and $31.4\%$ O by mass. What is the identity of alcohol U?
- A2-methylbutan-2-ol
- B3-methylbutan-2-ol
- Cpentan-1-ol
- Dpropan-1-ol