Answer: {2}.
- A Empty set
- B {2}
- C {2, 4}
- D Infinite set
Correct answer: B. {2}
Explanation: The only even prime number is 2. So A = {2}, a singleton set.
A Venn diagram makes set identities visual: A∪B is everything inside either circle, A∩B is only the overlap, and the region outside both circles represents the complement of their union - directly illustrating De Morgan's law (A∪B)′ = A′∩B′.
Concept context
Types of sets, operations (union/intersection/complement), relations, and types of functions with domain and range