The number of roamn capital letters such as A,B,C,D... Which are not laterally inverted by a plane mirror is

Options

A. 6
B. 7
C. 11
D. 13

Answer

To determine the number of Roman capital letters that are not laterally inverted by a plane mirror, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Lateral Inversion**:
- Lateral inversion occurs when an object is reflected in a mirror, resulting in a reversal of its left and right sides. We need to identify letters that remain unchanged when reflected.

2. **List of Roman Capital Letters**:
- The Roman capital letters are: A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z.

3. **Identifying Symmetrical Letters**:
- We need to analyze each letter to see if it has a vertical line of symmetry. If it does, it will not be laterally inverted.
- The letters that are symmetrical and do not change upon reflection in a mirror are:
- A, H, I, M, O, T, U, V, W, X, Y.

4. **Counting the Symmetrical Letters**:
- From the analysis, we can count the letters that are symmetrical:
- A, H, I, M, O, T, U, V, W, X, Y.
- This gives us a total of 11 letters.

5. **Conclusion**:
- Therefore, the number of Roman capital letters that are not laterally inverted by a plane mirror is **11**.

### Final Answer:
The total number of Roman capital letters that are not laterally inverted by a plane mirror is **11**.

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