Which of the following come(s)under the category of antimicrobial drug?

Options

A. antibiotics
B. antiseptics
C. disinfectants
D. all of these

Answer

To determine which of the options comes under the category of antimicrobial drugs, we need to understand what antimicrobial drugs are and analyze each option provided.

### Step-by-Step Solution:

1. **Understand Antimicrobial Drugs**:
- Antimicrobial drugs are substances that either kill microbes or inhibit their growth. These microbes can be bacteria, fungi, or protozoans, and they are often pathogens that cause diseases.

2. **Analyze the Options**:
- **Option 1: Antibiotics**:
- Antibiotics are a type of antimicrobial drug specifically designed to kill or inhibit the growth of bacteria. Therefore, antibiotics are considered antimicrobial drugs.

- **Option 2: Antiseptics**:
- Antiseptics are substances that are applied to living tissues (like skin) to reduce the possibility of infection, sepsis, or putrefaction. They kill or inhibit the growth of microbes on living surfaces, making them antimicrobial agents.

- **Option 3: Disinfectants**:
- Disinfectants are chemical agents used to kill or inhibit the growth of microbes on non-living surfaces. They are also classified as antimicrobial drugs because they serve the purpose of eliminating harmful microorganisms.

- **Option 4: All of these**:
- Since all three options (antibiotics, antiseptics, and disinfectants) are types of antimicrobial drugs, this option suggests that all the previous options fall under the category of antimicrobial drugs.

3. **Conclusion**:
- After analyzing each option, we find that all of them (antibiotics, antiseptics, and disinfectants) are indeed antimicrobial drugs. Therefore, the correct answer is **Option 4: All of these**.

### Final Answer:
**Option 4: All of these**