Explanation:

- Option 1: Illegible

- This is the correct spelling. It means something that cannot be read due to poor handwriting or faded text.

- Correct Answer

- Option 2: Illejible

- This spelling is incorrect. It mixes letters, deviating from the standard spelling.

- Option 3: Ilegibel

- This is also incorrect. It misses letters and doesn’t align with how the word is properly spelled.

- Option 4: Illijible

- Similar to the others, this is incorrect. It misplaces letters, leading to a misspelling.