Answer: Empty set is a subset of A.
- A A subset of empty set
- B Empty set is a subset of A
- C A = empty set
- D A subset of A'
Correct answer: B. Empty set is a subset of A
Explanation: The empty set is a subset of every set, including A. This is a universal rule.
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