Dental formula of adult man is-

Options

A. `(2,1,2,3)/(2,1,2,3)`
B. `(2,1,2,3)/(2,1,2,2)`
C. `(2,1,2,3)/(2,1,2,4)`
D. `(2,1,3,2)/(2,1,3,2)`

Answer

### Step-by-Step Solution

1. **Understanding Dental Formula**: The dental formula is a way to represent the number and types of teeth in a particular species, expressed in a fraction format. The upper jaw's teeth count is written above the line, while the lower jaw's count is written below.

2. **Identifying Types of Teeth in Adults**: In adult humans, the secondary dentition consists of:
- 2 pairs of incisors (total 8)
- 1 pair of canines (total 2)
- 2 pairs of premolars (total 8)
- 3 pairs of molars (total 12)

3. **Counting Teeth in Each Jaw**:
- For the upper jaw:
- Incisors: 2
- Canines: 1
- Premolars: 2
- Molars: 3
- This gives us the upper jaw formula: 2 1 2 3.

- For the lower jaw, the count is the same:
- Incisors: 2
- Canines: 1
- Premolars: 2
- Molars: 3
- This gives us the lower jaw formula: 2 1 2 3.

4. **Writing the Complete Dental Formula**: Combining both jaws, the dental formula for an adult human is written as:
\[ \text{Dental Formula} = \frac{2 \, 1 \, 2 \, 3}{2 \, 1 \, 2 \, 3} \]

5. **Selecting the Correct Option**: Among the options provided, the correct dental formula for an adult man is:
- **Option 1**: \( \frac{2 \, 1 \, 2 \, 3}{2 \, 1 \, 2 \, 3} \)

### Final Answer
The dental formula of an adult man is \( \frac{2 \, 1 \, 2 \, 3}{2 \, 1 \, 2 \, 3} \).

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