Correct Answer: TABLET

Solution : Given:
ROTARYBLUES

Now, let's compare all the option words with the word ROTARYBLUES –
First option: STARY; All the letters of STARY are present in the word ROTARYBLUES.
Second option: LOTUS; All the letters of LOTUS are present in the word ROTARYBLUES.
Third option: TABLET; The letter T appears only once in the word ROTARYBLUES. But, in TABLET, T appears two times. Therefore, all the letters of TABLET are not present in the word ROTARYBLUES.
Fourth option: BUTLER; All the letters of BUTLER are present in the word ROTARYBLUES.

So, from the above, only TABLET cannot be formed with the help of the letters of the word ROTARYBLUES. Hence, the third option is correct.