Which of the following sets is an example of a null set?

• A. {1, 2, 3}
• B. {𝑥 | 𝑥 is a prime number less than 2}
• C. {𝑎, 𝑏, 𝑐}
• D. {1, 2, 4}

• {𝑥 | 𝑥 is a prime number less than 2}

Please select one of the options to reveal the correct answer.