The structural formulae of two organic compounds, P and Q, are given below. P: $\text{CH}_3\text{CH}_2\text{CH}_2\text{OH}$ Q: $\text{CH}_3\text{CH} = \text{CHCH}_3$ What class of organic compounds do P and Q belong to?
- AP: alcohol, Q: alkane
- BP: alcohol, Q: alkene
- CP: carboxylic acid, Q: alkane
- DP: carboxylic acid, Q: alkene