If φ denotes the empty set, then which one of the following is correct ?

Question

If φ denotes the empty set, then which one of the following is correct ? (A) φ ∈ φ (B) φ ∈ φ  (C)  φ ∈ φ  (D)  0 ∈ φ

Tardigrade Admin · Accepted Answer

Since, φ is an empty set, φ ∈ φ

Q. If $ϕ$ denotes the empty set, then which one of the following is correct ?