b. caught

• The underlined part of "caught" is pronounced differently from the other words where the "au" in "caught" is pronounced like /ɔ:/, while in "laugh," "naughty," and "taught," the "au" sound is more of /ɑ:/.

b. solar

• The underlined part of "solar" has a different vowel sound /oʊ/ compared to the other words, where the "o" or "e" has a /aɪ/ or /e/ sound.

b. watched

• The underlined part of "watched" is pronounced differently because it has a /t/ sound, while the other words end in /d/ sounds.

b. power

• The stress pattern of "power" is different because it is a one-syllable word, while "permanent," "permission," and "carpet" have more than one syllable with their stress patterns.

c. heroic

• The stress pattern of "heroic" is different because it is typically stressed on the second syllable, while "photography," "minority," and "amateur" have their main stress on the first or second syllable