If the positions of the first and sixth letters of the word 'BENEFICIAL' are interchanged, similarly the positions of the second and seventh letters are interchanged and so on, which letter will be third from right end after rearrangement?

Options

A. C
B. E
C. F
D. N

Explanation

To solve the problem step by step, we will rearrange the letters of the word "BENEFICIAL" according to the specified interchanges and then identify the letter that is third from the right end after the rearrangement.

### Step-by-Step Solution:

1. **Identify the Letters and Their Positions**:
The word is "BENEFICIAL". Let's list the letters with their positions:
- 1: B
- 2: E
- 3: N
- 4: E
- 5: F
- 6: I
- 7: C
- 8: I
- 9: A
- 10: L

2. **Interchange the Letters**:
According to the problem, we need to interchange the following positions:
- 1st and 6th: B ↔ I
- 2nd and 7th: E ↔ C
- 3rd and 8th: N ↔ I
- 4th and 9th: E ↔ A
- 5th and 10th: F ↔ L

Let's perform these interchanges one by one:
- After interchanging 1st and 6th: I, E, N, E, F, B, C, I, A, L
- After interchanging 2nd and 7th: I, C, N, E, F, B, E, I, A, L
- After interchanging 3rd and 8th: I, C, I, E, F, B, E, N, A, L
- After interchanging 4th and 9th: I, C, I, A, F, B, E, N, E, L
- After interchanging 5th and 10th: I, C, I, A, L, B, E, N, E, F

The new arrangement of letters is: **ICIALEBNF**

3. **Identify the 3rd Letter from the Right End**:
Now, we need to find the 3rd letter from the right end of the new arrangement "ICIALEBNF".
- From the right end, the letters are:
- 1st from right: F
- 2nd from right: N
- 3rd from right: E

Therefore, the letter that is 3rd from the right end is **E**.

### Final Answer:
The letter that is third from the right end after rearrangement is **E**.