Answer: {2, 3}.
- A {2, 3}
- B {1, 4}
- C {1, 2, 3, 4}
- D { }
Correct answer: A. {2, 3}
Explanation: The intersection keeps the common elements 2 and 3.
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