Concept:The consonant sound cluster represented by the underlined letters in "punctual" is /ŋk/. We must find the word containing the same consonant sound.Explanation:"punctual" is pronounced /ˈpʌŋk.tʃu.əl/. The letters "nc" together produce the sound /ŋk/. Now check each option: A. "ankle" is pronounced /’æng.k@l/. It also contains the consonant cluster /ŋk/. B. "funny" has only the sound /n/, not /ngk/. C. "damn" has a silent "n" and ends with /m/, not /ŋk/. D. "thin" begins with the voiceless dental fricative /θ/, not /nk/.Answer:A. ankle