Correct Answer: magnificient

Solution : The correct choice is the second option .

The incorrectly spelled word is "magnificient", which contains an extra vowel "i". Magnificent is the correct spelling. It is used to describe something that is very beautiful, awe-inspiring, and needs to be admired.

The meanings of the other options are as follows:

• A millionaire is someone whose assets are worth over a million dollars.
• Mediocre is something that is of low quality.
• Miraculous is used to describe events that are inexplicable or seem to defy the laws of nature.