The correct answer is C. Allright. The correct spelling is "all right".
- Allottee is a noun that means "a person to whom something is allotted".
- Almighty is an adjective that means "all-powerful".
- Altogether is an adverb that means "in all; completely".
The word "allright" is not a word in the English language. It is a common misspelling of the phrase "all right".