Which of the following is a good behavior to show during an interview?

Smiling during an interview is a positive and effective behavior because it conveys confidence, openness, and approachability. A smile helps to establish rapport with the interviewer and creates a friendly atmosphere, which can make the interaction more enjoyable and productive. It demonstrates that you are engaged and interested in the conversation, which can leave a lasting impression on the interviewer.

In contrast, nail biting may signal anxiety or nervousness, which could detract from the professional image you want to project. Unusual or overly memorable clothing might distract from your qualifications and the content of your conversation, leading the interviewer to focus more on your appearance than on what you have to offer. Lastly, expressing personal opinions on politics, social issues, and religion can be risky in a professional setting, as these topics might be polarizing or inappropriate depending on the context of the interview. Therefore, maintaining a positive demeanor and being mindful of your presentation is crucial for success in an interview.