Which of the following words can be formed from the letters of the word 'RECOGNITION', using each letter only once?

Let's count available letters in 'RECOGNITION': $\text{{R:1, E:1, C:1, O:2, G:1, N:2, I:2, T:1}}$
* 'NATIVE': Contains 'A' and 'V' (not available).
* 'MAGIC': Contains 'M' and 'A' (not available).
* 'EMOTION': Contains 'M' (not available).
* 'REGION': Letters are $\text{{R, E, G, I, O, N}}$. All are single counts and explicitly present in 'RECOGNITION'.
Therefore, 'REGION' is the only word that can be formed.