Concept:The phonetic symbol in the question represents the consonant sound /k/.
Explanation:The word "cane" is pronounced
/kein/ and clearly begins with the /k/ sound.
In contrast, "chain" is pronounced
/chain/, so it starts with the /tʃ/ sound, not /k/.
In "knight", pronounced
/nait/, the letter "k" is silent.
Similarly, in "knife", pronounced
/naif/, the "k" is also silent.
Therefore, among the options, only "cane" contains the /k/ sound.
Answer:A. cane