Correct Answer: Illogical

Solution : The correct choice is the first option.

Explanation: "Rational" refers to something based on reason, logic, or sound judgement. Its opposite, "illogical" refers to something lacking reason or logic.

The meanings of the other options are as follows:

• Polite means showing good manners and respect for others.
• Conscious refers to being aware of and perceiving one's surroundings.
• Impatient refers to having a lack of patience or tolerance for delay.

Therefore, the correct answer is illogical.