· Embarrass: Correctly spelled. "Embarrass" means "cause (someone) to feel awkward, self-conscious, or ashamed."
· Connoisseur: Correctly spelled; refers to an expert in matters of taste.
· Relevant: Correct spelling; "Relevent" is incorrect. "Relevant" means "closely connected or appropriate to what is being done or considered."
· Bureaucracy: Correctly spelled; refers to a system of government where important decisions are made by officials.
Thus, the incorrectly spelled word is Relevent.
Hence, option (c) is the answer.