Answer
a. This transition is forbidden, because $\Delta \mathcal{l}=0$.
b. This transition is allowed, because $\Delta \mathcal{l}=-1$.
c. This transition is forbidden, because $\Delta \mathcal{l}=0$.
d. This transition is forbidden, because $\Delta \mathcal{l}=-2$.
e. This transition is allowed, because $\Delta \mathcal{l}=+1$.
Work Step by Step
On page 814, the selection rule tells us that for allowed transitions, $\Delta \mathcal{l}=\pm 1$.