Correct Answer: Rude

Solution : The correct choice is the first option.

Polite means having or showing behaviour that is respectful and considerate of other people.

Rude means ill-mannered or offensive in manner or action, making this the correct antonym of polite .

The meanings of the other options are as follows:

• Civil means courteous and polite, which makes it a synonym.
• Decent means socially accepted and moral behaviour.
• Sober means thoughtful or sensible.