Find the odd one out from the following series:

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Accepted Answer

**Solution:**

1. Analyze each option by checking the pattern of letters and their positions in the alphabet.

2. For options (a), (b), (d), and (e), the first and third letters have a consistent relationship with the middle letter:

- (a) BVK: B (2), V (22), K (11)
     - The middle letter V is the sum of the positions of B and K: 2 + 11 = 13, but V is 22, so check difference instead.
     - Actually, the difference between V and B is 20, and between K and V is 11.

Let's check the difference between letters for all options:

- (a) BVK:
     - B to V: 22 - 2 = 20
     - V to K: 11 - 22 = -11

- (b) DLC:
     - D (4), L (12), C (3)
     - D to L: 12 - 4 = 8
     - L to C: 3 - 12 = -9

- (c) BKE:
     - B (2), K (11), E (5)
     - B to K: 11 - 2 = 9
     - K to E: 5 - 11 = -6

- (d) IRB:
     - I (9), R (18), B (2)
     - I to R: 18 - 9 = 9
     - R to B: 2 - 18 = -16

- (e) COE:
     - C (3), O (15), E (5)
     - C to O: 15 - 3 = 12
     - O to E: 5 - 15 = -10

3. Another approach is to check the pattern of letters:

- In options (a), (b), (d), and (e), the first and third letters are in alphabetical order with the middle letter in between or following a certain pattern.

4. Check the vowels and consonants:

- (a) BVK: B (consonant), V (consonant), K (consonant)
   - (b) DLC: D (consonant), L (consonant), C (consonant)
   - (c) BKE: B (consonant), K (consonant), E (vowel)
   - (d) IRB: I (vowel), R (consonant), B (consonant)
   - (e) COE: C (consonant), O (vowel), E (vowel)

5. From the above, option (c) is the only one where the third letter is a vowel while the first two are consonants, which makes it different from others.

**Answer:** (c) BKE

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