Final answer:
The nasal phoneme you hear in 'wrinkle' is c./ŋ/.
Step-by-step explanation:
In the word 'wrinkle,' the nasal phoneme you hear is /ŋ/ (option c).
The /ŋ/ sound is represented by the letter 'n' followed by the letter 'k,' as in 'wrinkle.' This sound is called a nasal because it is produced by blocking the airflow through the mouth and directing it through the nose.
To hear the /ŋ/ sound, pronounce the word 'sing' and pay attention to the sound at the end. It should be similar to the sound in 'wrinkle.'