In human the number of premolar teeth in each jaw

Options

A. 2
B. 3
C. 4
D. 6

Answer

To solve the question regarding the number of premolar teeth in each jaw of humans, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for the number of premolar teeth present in each jaw of humans.

2. **Know the Dental Formula**: The dental formula for humans is represented as 2-1-2-3 for the upper jaw and 2-1-2-3 for the lower jaw. This formula indicates the number of each type of tooth in one half of the jaw.

3. **Identify the Components of the Dental Formula**:
- The first number (2) represents the incisors.
- The second number (1) represents the canines.
- The third number (2) represents the premolars.
- The fourth number (3) represents the molars.

4. **Focus on Premolars**: From the dental formula, we see that there are 2 premolars in each half of the jaw. Since there are two halves (the upper jaw and the lower jaw), we need to consider both.

5. **Calculate Total Premolars in Each Jaw**:
- Each jaw has 2 premolars.
- Therefore, in each jaw (upper or lower), the number of premolar teeth is 2.

6. **Final Answer**: Since the question asks for the number of premolar teeth in each jaw, the answer is 2 premolar teeth in the upper jaw and 2 premolar teeth in the lower jaw.

### Conclusion:
Thus, the number of premolar teeth in each jaw of humans is **2**.