In an alphabet series: A interchanges its position with C, B interchanges its position with D, and so on till P. Which of the following letter will come at the `13^(th)` place from left end?

Options

A. M
B. N
C. O
D. P

Answer

To solve the problem of finding the letter that comes at the 13th place after the specified interchanges in the alphabet series, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Alphabet Series**:
The English alphabet consists of 26 letters:
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.

2. **Understand the Interchange Pattern**:
According to the problem, the letters interchange as follows:
- A ↔ C
- B ↔ D
- E ↔ G
- F ↔ H
- I ↔ K
- J ↔ L
- M ↔ O
- N ↔ P

This means that for every pair of letters, the first letter of the pair takes the position of the second letter and vice versa.

3. **Determine the 13th Letter in the Original Series**:
The 13th letter in the original alphabet series is M.

4. **Find the Interchanged Letter for M**:
From the interchange pattern, we see that M (which is at position 13) interchanges with O (which is at position 15).

5. **Conclusion**:
Therefore, after the interchange, the letter that comes at the 13th position is O.

### Final Answer:
The letter that will come at the 13th place from the left end after the interchanges is **O**.