Dental formula of adult humans is

Options

A. `3/3,1/1,3/2,1/1`
B. `2/2, 1/1,3/2,3/3`
C. `2/2,1/1,2/2,3/3`
D. `3/3,1/1,3/3,3/3`

Answer

To determine the dental formula of adult humans, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Dental Formula**:
- The dental formula represents the number and types of teeth in one quadrant of the mouth. For adult humans, the formula consists of incisors, canines, premolars, and molars.

2. **Identifying the Teeth in Each Quadrant**:
- In each quadrant, the distribution of teeth is as follows:
- **2 Incisors**: The two front teeth used for cutting.
- **1 Canine**: The pointed tooth next to the incisors, used for tearing food.
- **2 Premolars**: The flat-topped teeth behind the canines, used for crushing and grinding food.
- **3 Molars**: The larger teeth at the back of the mouth, also used for grinding food.

3. **Writing the Dental Formula**:
- Therefore, in one quadrant, the dental formula can be written as:
- 2 (Incisors) : 1 (Canine) : 2 (Premolars) : 3 (Molars)

4. **Calculating the Total for All Quadrants**:
- Since there are 4 quadrants in the mouth, we multiply the number of each type of tooth by 4:
- Incisors: 2 x 4 = 8
- Canines: 1 x 4 = 4
- Premolars: 2 x 4 = 8
- Molars: 3 x 4 = 12

5. **Total Number of Teeth**:
- Adding these together gives us the total number of teeth in an adult human:
- Total = 8 (Incisors) + 4 (Canines) + 8 (Premolars) + 12 (Molars) = 32 teeth

6. **Final Dental Formula Representation**:
- The complete dental formula for adult humans can be expressed as:
- **2:1:2:3** for each quadrant, or in total as **2/1/2/3** for the entire mouth.

### Conclusion:
The dental formula of adult humans is **2:1:2:3** for each quadrant, leading to a total of **32 teeth**.

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