B. carp
Explanation: The "a" in "carp" is pronounced as /æ/, whereas in the other words, the "a" is pronounced as /ə/ or /ɪ/.

C. decorative
Explanation: The "o" in "decorative" is pronounced differently compared to the other words where the "o" has the sound /ɒ/ or /ə/.

A. column
Explanation: The "o" in "column" is pronounced as /ɒ/ (like in "dog"), whereas in the other words, the "o" has the /ə/ sound.

B. maintain
Explanation: The "ai" in "maintain" is pronounced as /eɪ/ (like in "say"), while the "o" in the other words has a different sound.

B. language
Explanation: The "a" in "language" is pronounced as /æ/, while the other words have a different vowel sound.

C. table
Explanation: The "a" in "table" is pronounced as /eɪ/, whereas the other words have the short vowel sound /æ/ or /ɒ/.

B. admire
Explanation: The "i" in "admire" is pronounced as /aɪ/, whereas in the other words, the "i" is pronounced as /ɪ/ or /ə/.

C. October
Explanation: The "o" in "October" is pronounced as /ɒ/, while the other words have a different vowel sound for "o."

D. happen
Explanation: The "a" in "happen" is pronounced as /æ/, while in the other words, it is pronounced differently.

C. plough
Explanation: The "ough" in "plough" is pronounced as /aʊ/, while in the other words, it has a different pronunciation (like /oʊ/ or /ɪ/).