Let A = {ϕ, {ϕ}, 1, {1, ϕ}, 2}. Which of the following are true? (i) {{2}, {1}} ⊄ A (ii) {ϕ, {ϕ}, {1, ϕ}} ⊂ A (iii) {{ϕ}} ⊂ A

Answers:

(i) This statement is True

Reason – Neither {2} and nor {1} is a subset of set A.

(ii) This statement is True

Reason – All three {ϕ, {ϕ}, {1, ϕ}} are subset of set A.

(iii) True

Reason – {{ϕ}} is a subset of set A.