Concept:Identify the consonant sound of the underlined letter in "hack" and match it with the option where the same sound is pronounced.
Explanation:The underlined letter is "h" in "hack".
It is pronounced as the voiceless glottal fricative /h/.
Now check the options for the same /h/ sound.
A. "schedule" has no /h/ sound; it begins with /ʃ/ or /sk/.
B. "behaviour" is pronounced /bɪˈheɪvjə/; the letter "h" here is pronounced /h/.
C. "honourable" has a silent "h", so it begins with /ɒ/ or /ɑ/.
D. "exhibit" has no pronounced /h/; it is pronounced /ɪɡˈzɪbɪt/.
Only "behaviour" contains the same consonant sound /h/ as in "hack".
Answer:B. behaviour