Which of the following sets is an example of a null set?
- A. {1, 2, 3}
- B. {? | ? is a prime number less than 2}
- C. {?, ?, ?}
- D. {1, 2, 4}
- {? | ? is a prime number less than 2}
Please select one of the options to reveal the correct answer.
Please select one of the options to reveal the correct answer.