Correct Answer: CENTRAL

Solution : Given:
CONCENTRATION

Now, let's compare all the option words with the word CONCENTRATION –
First option: CONCERN; All the letters of the word CONCERN are present in the word CONCENTRATION.
Second option: CONTAINER; All the letters of the word CONTAINER are present in the word CONCENTRATION.
Third option: CONCERT; All the letters of the word CONCERT are present in the word CONCENTRATION.
Fourth option: CENTRAL; All the letters of the word CENTRAL are not present in the word CONCENTRATION. L is not present in the word CONCENTRATION.

Therefore, CENTRAL cannot be formed from the word CONCENTRATION. Hence, the fourth option is correct.