Q. Which of the following statements best describes pharmacodynamics? (Solved)

1. The study of how drugs reach their target in the body and how the levels of a drug in the blood are affected by absorption, distribution, metabolism and excretion.

2. The study of how drugs can be designed using molecular modelling based on a drug's pharmacophore.

3. The study of how a drug interacts with its target binding site at the molecular level.

4. The study of which functional groups are important in binding a drug to its target binding site and the identification of a pharmacophore.