Correct Answer: smug

Solution : The correct choice is the second option .

Complacent refers to a self-satisfied or overly content attitude, often without being aware of potential dangers or shortcomings.

Smug also conveys a sense of self-satisfaction or excessive contentment, often with an air of superiority or self-importance. Therefore, it is the correct synonym.

The meanings of the other options are as follows:

• Discontent refers to a feeling of dissatisfaction or lack of contentment.

• Aggressive refers to forceful or assertive behaviour, often involving confrontation or hostility.

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• Amicable means having a friendly and agreeable disposition.