Question

Which of the following is correct?

a) ∅ ⊆ {a, b} b) ∅ ∈ {a,b} c) {a} ∈ { a, b} d) a ⊆ {a, b}​

Answer 1

Answer:

the Right answer is b .

b) ∅ ∈ {a,b}