The total number of teeth in a rat

Options

A. 10
B. 16
C. 20
D. 28

Explanation

To determine the total number of teeth in a rat, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Dental Formula**:
- The dental formula for a rat is given as 1003/1003. This notation indicates the number and types of teeth present in the upper and lower jaws.

2. **Interpret the Dental Formula**:
- In the dental formula 1003/1003, the first part (1003) refers to the upper jaw, and the second part (1003) refers to the lower jaw.
- Each digit in the formula represents the number of different types of teeth: incisors, canines, premolars, and molars.

3. **Calculate the Total Number of Teeth**:
- To find the total number of teeth, we add the teeth from both the upper and lower jaws.
- From the formula, we have 10 teeth in the upper jaw and 10 teeth in the lower jaw.

4. **Perform the Addition**:
- Total teeth = Upper jaw teeth + Lower jaw teeth
- Total teeth = 10 (upper) + 10 (lower) = 20 teeth.

5. **Conclusion**:
- Therefore, the total number of teeth in a rat is 20.

### Final Answer:
The total number of teeth in a rat is 20.

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