Let's match the plants and their respective properties based on the information provided:
- Vatsanabha is associated with Aconitine, a toxic alkaloid, making (A) match with (III).
- Pita Karvira is associated with Thevetin, a toxic substance found in certain plants, making (B) match with (I).
- Gunja contains Morphine, an alkaloid present in the plant, so (C) matches with (II).
- Ahiphena contains Morphine as well, making (D) also match with (II).
Thus, the correct matching is (A)
-(III), (B)
-(I), (C)
-(II), (D)
-(II).