a) None
b) One
c) Two
d) Three
Let's re-evaluate the problem carefully to identify any possible errors in the previous analysis.
Step-by-Step Re-Evaluation:
1. Original Word: INCOMPREHENSIBILITIES
2. Frequency Count:
- I: 5
- N: 2
- C: 1
- O: 1
- M: 1
- P: 1
- R: 1
- E: 3
- H: 1
- S: 2
- B: 1
- L: 1
- T: 1
3. Reverse Alphabetical Order:
- T, S, S, R, P, O, N, N, M, L, I, I, I, I, I, H, E, E, C, B
4. Original Order for Comparison:
- I, N, C, O, M, P, R, E, H, E, N, S, I, B, I, L, I, T, I, E, S
5. Identifying Unchanged Positions:
- Compare each position in the original word with the reverse alphabetical order:
| Position | Original | Reverse | Unchanged? |
|----------|----------|---------|------------|
| 1 | I | T | No |
| 2 | N | S | No |
| 3 | C | S | No |
| 4 | O | R | No |
| 5 | M | P | No |
| 6 | P | O | No |
| 7 | R | N | No |
| 8 | E | N | No |
| 9 | H | M | No |
| 10 | E | L | No |
| 11 | N | I | No |
| 12 | S | I | No |
| 13 | I | I | Yes |
| 14 | B | I | No |
| 15 | I | I | Yes |
| 16 | L | H | No |
| 17 | I | E | No |
| 18 | T | E | No |
| 19 | I | E | No |
| 20 | E | C | No |
| 21 | S | B | No |
Conclusion:
From the table, we see that the letters in positions 13, and 15 remain unchanged when the letters are arranged alphabetically in reverse order. Thus, there are indeed three unchanged positions, and the correct answer is:
c) Two