the study of action of drag is know as

Options

A. Physiology
B. Pharmacology
C. Phramacognosy
D. Pharmaceutical chemistry

Answer

To solve the question, "the study of action of drugs is known as," we will analyze the options provided and identify the correct term that corresponds to the study of drug action.

### Step-by-Step Solution:

1. **Understanding the Question**:
- The question asks for the term that describes the study of how drugs act in the body.

2. **Analyzing the Options**:
- **Option A: Psychology**
- This field focuses on the study of the mind and behavior, not specifically the action of drugs. Thus, this option is incorrect.

- **Option B: Pharmacology**
- This is the branch of medicine that deals with the study of drugs, their effects, mechanisms of action, and how they interact with biological systems. This option is correct as it directly pertains to the study of drug action.

- **Option C: Pharmacognosy**
- This field involves the study of drugs derived from natural sources, such as plants. While it relates to drugs, it does not specifically focus on their action. Therefore, this option is incorrect.

- **Option D: Pharmaceutical Chemistry**
- This area focuses on the chemical aspects of drug development and synthesis, rather than their action in the body. Thus, this option is also incorrect.

3. **Conclusion**:
- After analyzing all the options, we conclude that the correct answer is **Option B: Pharmacology**, as it specifically refers to the study of the action of drugs.

### Final Answer:
The study of the action of drugs is known as **Pharmacology**.