Answer: (B − A).
- A (B − A)
- B (A ∩ B)
- C (A ∪ B)
- D (A − B)
Correct answer: A. (B − A)
Explanation: The symmetric difference is (A − B) ∪ (B − A): elements in exactly one of the sets.
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