A student used the high-power lens of a light microscope to produce some labelled drawings of lung tissue, but two airways, P and Q, were left unnamed. In the drawing of the lining of P, both ciliated cells and goblet cells were present, whereas the drawing of the lining of Q contained ciliated cells but only a very small number of goblet cells. Which airways are P and Q?
- AP: bronchiole, Q: trachea
- BP: bronchiole, Q: bronchus
- CP: bronchus, Q: bronchiole
- DP: trachea, Q: bronchus