Concept:The consonant letters "ch" are not always pronounced the same way.
In English, "ch" may sound like /tʃ/ as in "chair" or like /k/ as in "school".
The aim is to choose the option whose "ch" sound matches the underlined sound in the question.
Explanation:In "challenge", "ch" has the /tʃ/ sound, and the word is pronounced /ˈtʃælɪndʒ/.
In "match", "ch" also produces /tʃ/, giving /mætʃ/.
In "chime", the sound is again /tʃ/, so it is read as /tʃaɪm/.
In "chimera", however, "ch" gives the /k/ sound, so the word is pronounced /kaɪˈmɪərə/.
Only "chimera" has the /k/ consonant sound, which is the required matching sound for the underlined letters.
The other three options all begin with the /tʃ/ sound and therefore cannot be correct.
Answer:C. chimera