The number of capital latters such as `A,B,C,D"….."` which are not latterally inverted by a plane mirror ?

Options

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

Answer

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

### Step 1: Understand Lateral Inversion
Lateral inversion refers to the phenomenon where the left side of an object appears on the right side and vice versa when viewed in a mirror. We need to identify which capital letters remain unchanged when reflected in a plane mirror.

### Step 2: List the Capital Letters
The capital letters of the English alphabet 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.

### Step 3: Identify Letters Not Laterally Inverted
Now, we will analyze each letter to see if it looks the same when reflected in a mirror:
- A: Not laterally inverted
- B: Laterally inverted
- C: Laterally inverted
- D: Laterally inverted
- E: Laterally inverted
- F: Laterally inverted
- G: Laterally inverted
- H: Not laterally inverted
- I: Not laterally inverted
- J: Laterally inverted
- K: Not laterally inverted
- L: Laterally inverted
- M: Not laterally inverted
- N: Laterally inverted
- O: Not laterally inverted
- P: Laterally inverted
- Q: Laterally inverted
- R: Laterally inverted
- S: Laterally inverted
- T: Not laterally inverted
- U: Not laterally inverted
- V: Not laterally inverted
- W: Not laterally inverted
- X: Not laterally inverted
- Y: Not laterally inverted
- Z: Laterally inverted

### Step 4: Count the Letters
From the analysis, the letters that are not laterally inverted are:
A, H, I, K, M, O, T, U, V, W, X, Y.

Counting these letters gives us a total of 11 letters.

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

---