Question 102

Boy, Buy, and Coin contain diphthongs.

The words "Boy," "Buy," and "Coin" include diphthongs, which are complex vowel sounds that begin with one vowel sound and glide into another within the same syllable.

A) Boy

"Boy" contains the diphthong sound /ɔɪ/, where the vowel sound shifts from /ɔ/ to /ɪ/. This combination clearly demonstrates the definition of a diphthong, making it a valid choice.

B) Mother

"Mother" does not contain a diphthong; instead, it features a simple vowel sound /ʌ/. The absence of the glide between two vowel sounds means it does not qualify as a diphthong.

C) Buy

"Buy" includes the diphthong /aɪ/, transitioning from the sound /a/ to /ɪ/. This movement between vowel sounds confirms that "Buy" is indeed a word containing a diphthong.

D) Apple

"Apple" has the simple vowel sound /æ/ and does not feature the glide characteristic of diphthongs. Therefore, it does not meet the criteria for inclusion.

E) Coin

"Coin" features the diphthong /ɔɪ/, where the sound shifts from /ɔ/ to /ɪ/. This confirms that "Coin" is another valid example of a word that contains a diphthong.

Conclusion

In summary, "Boy," "Buy," and "Coin" are the correct answers as they each contain distinct diphthong sounds, characterized by the glide between two vowel sounds. The other options, "Mother" and "Apple," do not fulfill the criteria for diphthongs, as they consist of simple vowel sounds without the necessary transitions.