B. key

• In this case, the "k" in "key" is pronounced with the "k" sound /k/, whereas the other words have a silent "k" (knock, pocket, milk).

C. queue

• "Queue" is pronounced /kjuː/, while "queen" (/kwiːn/), "square" (/skweə/), and "quick" (/kwɪk/) have a different "kw" sound at the beginning.

A. carrot

• The "c" in "carrot" is pronounced with a hard /k/ sound, while the "c" in "city" (/s/), "cake" (/k/), and "class" (/k/) is different in the case of "city."

A. chopstick

• "Chopstick" has an "o" sound pronounced /ɔ/, while "chicken," "cheek," and "character" all have a different "i" sound.

B. give

• The vowel sound in "give" is pronounced with /ɪ/, while the others ("age," "garden," "guitar") are pronounced with a different vowel sound.

C. basic

• The "a" in "basic" is pronounced with /æ/, while the others ("ancestor," "gather," and "animal") have different vowel sounds.

C. peoples

• "Peoples" has the "s" sound pronounced as /z/, while the other words ("instruments," "others," "fields") end with the /s/ sound.

D. discriminate

• "Discriminate" has the "i" sound as /ɪ/, while the others ("showed," "called," and "lived") have different vowel sounds.

C. curious

• The "i" in "curious" is pronounced as /j/, whereas "basic" (/eɪ/), "minority" (/ɪ/), and "complicated" (/eɪ/) have different vowel sounds.

B. costume