Question Detail
Question
Vowel distinctions do not include:
Correct Answer
Option D is the correct answer.
Detailed Explanation
Vowels are classified as monophthongs (single sound), diphthongs (two sounds), and triphthongs (three sounds). 'Quadriphthongs' is not a recognized category in phonetics.
Hint
These terms refer to how many vowel sounds are combined, and four is not a standard category.