Find the correctly spelt word.

The correct answer is D. Millionaire.

The word “millionaire” is derived from the Latin words “mille” meaning “thousand” and “aere” meaning “silver.” The word was first used in the early 18th century to describe someone who had a million units of currency, usually gold or silver.

The word “millionair” is a misspelling of “millionaire.” It is often used in informal writing, but it is not considered to be a correct spelling.

The word “millionnaire” is a French spelling of “millionaire.” It is sometimes used in English, but it is not considered to be the standard spelling.

The word “milionaire” is a misspelling of “millionaire.” It is not a correct spelling in any language.