Match the following plant sources with their secondary metabolites and medical uses:

$\begin{array}{|l|l|l|} \hline \textbf{Source plant} & \textbf{Secondary metabolites} & \textbf{Medical use} \\ \hline \text{P. Belladona} & \text{1. Menthol} & \text{a. Cancer treatment} \\ \hline \text{Q. Foxglove} & \text{2. Atropine} & \text{b. Heart disease} \\ \hline \text{R. Pacific yew} & \text{3. Digitalin} & \text{c. Eye examination} \\ \hline \text{S. Eucalyptus} & \text{4. Taxol} & \text{d. Cough} \\ \hline \end{array}$

1. $\text{P-2-c, Q-3-b, R-4-a, S-1-d}$
2. $\text{P-3-c, Q-2-a, R-1-d, S-4-b}$
3. $\text{P-2-c, Q-4-b, R-1-a, S-3-d}$
4. $\text{P-1-b, Q-4-c, R-2-d, S-3-a}$