Correct Answer: COUNTER

Solution : Given:
ANNOUNCEMENTS

Now, let's compare all the option words with the word ANNOUNCEMENTS –
First option: CEMENT; All the letters of CEMENT are present in the word ANNOUNCEMENTS.
Second option: NOUN; All the letters of NOUN are present in the word ANNOUNCEMENTS.
Third option: COUNTER; All the letters of COUNTER are not present in the word ANNOUNCEMENTS. R is not present in the word ANNOUNCEMENTS.
Fourth option: TENSE; All the letters of TENSE are present in the word ANNOUNCEMENTS.

So, from the above, only COUNTER cannot be formed using the letters of the word ANNOUNCEMENTS. Hence, the third option is correct.