Explanation:

Let’s break down the question and the options:

- Impudent means rude or disrespectful.

- Option 1: Anxious — This means nervous or worried. This isn’t the opposite of impudent. You can be anxious but still be rude or respectful.

- Option 2: Polite — This means respectful and well-mannered. This is the exact opposite of impudent. If you’re polite, you’re definitely not being impudent.

- Option 3: Cautious — Means careful. Again, someone can be careful but rude or respectful, so it doesn’t fit.

- Option 4: Reckless — Means not caring about risks, often careless. This is different from being rude.

So, polite is the correct opposite to impudent.