Correct Answer: TALL

Solution : Given:
INSTALMENTS

Now, let's compare all the option words with the word INSTALMENTS –
First option: MEN; All the letters of MEN are present in the word INSTALMENTS.
Second option: TALL; The letter L is only present once in the word INSTALMENTS but is present twice in the word TALL. Therefore, all the letters of TALL are not present in the word INSTALMENTS.
Third option: STALE; All the letters of STALE are present in the word INSTALMENTS.
Fourth option: MENTAL; All the letters of MENTAL are present in the word INSTALMENTS.

So, TALL cannot be formed with the help of the letters of the word INSTALMENTS. Hence, the second option is correct.