Odd one out

Odd one out: **A. noisy**

Explanation:

- A: noisy (contains the letter "y", a consonant)
- B: convenient (contains the letters "e" and "e", vowels)
- C: clean (contains the letter "e", a vowel)
- D: cheap (contains the letter "e", a vowel)

The others (B, C, D) all have at least one vowel that is emphasized or special. The option A (noisy) has a consonant emphasized. Therefore, A is the odd one out.