Dental formula in human beings is

Options

A. `(3223)/(3223)`
B. `(3223)/(3223)`
C. `(2123)/(2123)`
D. `(3223)/(3223)`

Answer

To determine the dental formula in human beings, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Types of Teeth**:
In humans, there are four types of teeth: incisors (I), canines (C), premolars (P), and molars (M).

2. **Count the Number of Each Type of Tooth**:
- Incisors: 2 (I)
- Canines: 1 (C)
- Premolars: 2 (P)
- Molars: 3 (M)

3. **Write the Dental Formula**:
The dental formula is expressed in the form of a ratio. For adult humans, it is written as:
\[ \text{Dental Formula} = \frac{I_2 C_1 P_2 M_3}{I_2 C_1 P_2 M_3} \]
This can be simplified to:
\[ \text{Dental Formula} = \frac{2 1 2 3}{2 1 2 3} \]

4. **Calculate the Total Number of Teeth**:
To find the total number of teeth in an adult human, we multiply the number of each type of tooth by 2 (since the formula represents one half of the mouth):
\[ \text{Total Teeth} = (2 + 1 + 2 + 3) \times 2 = 32 \]

5. **Conclusion**:
The dental formula in humans is:
\[ \frac{2 1 2 3}{2 1 2 3} \]

### Final Answer:
The dental formula in human beings is \( \frac{2 1 2 3}{2 1 2 3} \).

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