Correct Answer: NATION

Solution : Given:
LOCALIZATION

Now, let's compare all the option words with the word LOCALIZATION –
First option: LOCAL; All the letters of LOCAL are present in the word LOCALIZATION.
Second option: ACTION; All the letters of ACTION are present in the word LOCALIZATION.
Third option: NATION; The letter N appears only once in the word LOCALIZATION. But, in NATION, N appears two times. Therefore, all the letters of NATION are not present in the word LOCALIZATION.
Fourth option: CATION; All the letters of CATION are present in the word LOCALIZATION.

So, from the above, only NATION cannot be formed from the word LOCALIZATION. Hence, the third option is correct.