Dental formula of a species is represents as following :
`2123/2123`. Select the incorrect statement about it:

Options

A. Right upper jaw is having 8 teeth
B. The given species has total 32 teeth.
C. Number of premolars in lower jaw is less than number of premolars in upper jaw
D. Both (a) and (c)

Answer

To solve the question regarding the dental formula represented as `2123/2123`, we need to analyze the given statements and determine which one is incorrect. The dental formula indicates the arrangement of teeth in each quadrant of the mouth.

### Step-by-Step Solution:

1. **Understanding the Dental Formula**:
- The dental formula `2123/2123` indicates the number of each type of tooth in one half of the mouth.
- The first number (2) represents the number of incisors.
- The second number (1) represents the number of canines.
- The third number (2) represents the number of premolars.
- The fourth number (3) represents the number of molars.

2. **Calculating the Total Number of Teeth**:
- Each side of the mouth has `2 + 1 + 2 + 3 = 8` teeth.
- Since there are two sides (left and right), the total number of teeth is `8 teeth/side * 4 sides = 32 teeth`.

3. **Evaluating the Statements**:
- **Statement A**: "The right upper jaw has 8 teeth."
- This statement is correct because each quadrant has 8 teeth.
- **Statement B**: "The given species has a total of 32 teeth."
- This statement is also correct as calculated above.
- **Statement C**: "The number of premolars in the lower jaw is less than the number of premolars in the upper jaw."
- This statement is incorrect because the dental formula shows that the number of premolars is the same in both the upper and lower jaws (2 in each).

4. **Conclusion**:
- The incorrect statement is **Statement C**.

### Final Answer:
The incorrect statement about the species with the dental formula `2123/2123` is: "The number of premolars in the lower jaw is less than the number of premolars in the upper jaw."

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