Out of the four alternatives, choose the one which best expresses the opposite…

An antonym question asks for the word whose meaning is the OPPOSITE of the given word, not a related or similar word. To solve it, first fix the core meaning of the given word, then check which option denotes the reverse quality rather than merely a synonym.

Charismatic means possessing a compelling personal charm or magnetism that attracts and inspires others. Its opposite must denote a quality that repels rather than attracts, something distasteful or off-putting. Repugnant means extremely distasteful, causing strong dislike or aversion, which is exactly this repelling quality, the direct opposite of Charismatic.

Why the other options are not opposites:

• Beguiling — charming or attractive, often deceptively so; a synonym of Charismatic, not its opposite.

• Captivating — capable of holding interest through charm; again a synonym, not an antonym.

• Glamorous — possessing glamour or charm; closely related to Charismatic in meaning, not opposite.

Since three of the four options describe an attractive, charming quality while only Repugnant describes a repelling, distasteful one, Repugnant is confirmed as the word opposite in meaning to Charismatic.