- 1. Snake root $\rightarrow$ Rauwolfia serpentina, belongs to Apocynaceae family.
$ \Rightarrow $ [R]
- 2. Artemisia $\rightarrow$ Source of drugs like artemisinin, belongs to Compositae (Asteraceae) family.
$ \Rightarrow $ [P]
- 3. Bitter almond $\rightarrow$ From Prunus amygdalus, belongs to Rosaceae family.
$ \Rightarrow $ [Q]
- 4. Myrrh $\rightarrow$ Oleo-gum resin from Commiphora species, belongs to Burseraceae family.
$ \Rightarrow $ [S]
This question checks whether each crude drug is correctly linked to its parent plant family: snake root, artemisia, bitter almond and myrrh against Apocynaceae, Compositae, Rosaceae and Burseraceae. Instead of matching drug by drug, each full combination given in the options can be tested against three fixed facts: snake root (Rauwolfia serpentina) belongs to Apocynaceae, artemisia belongs to Compositae, and myrrh (from Commiphora) belongs to Burseraceae.
Only the first combination places every drug in its correct family: snake root with Apocynaceae, artemisia with Compositae, bitter almond with Rosaceae, and myrrh with Burseraceae.
Therefore, the correct answer is 1-[R], 2-[P], 3-[Q], 4-[S].

List I | List II | ||
|---|---|---|---|
| A | \(\Omega^{-1}\) | I | Specific conductance |
| B | \(∧\) | II | Electrical conductance |
| C | k | III | Specific resistance |
| D | \(\rho\) | IV | Equivalent conductance |
List I | List II | ||
|---|---|---|---|
| A | Constant heat (q = 0) | I | Isothermal |
| B | Reversible process at constant temperature (dT = 0) | II | Isometric |
| C | Constant volume (dV = 0) | III | Adiabatic |
| D | Constant pressure (dP = 0) | IV | Isobar |