**(i)** True

Φ belongs to set A. Hence, true.

**(ii)** True

{Φ} is an element of set A. Hence, true.

**(iii)** False

1 is not an element of A. Hence, false.

**(iv)** True

{2, Φ} is a subset of A. Hence, true.

**(v)** False

2 is not a subset of set A, it is an element of set A. Hence, false.

**(vi)** True

{2, {1}} is not a subset of set A. Hence, true.

**(vii)** True

Neither {2} and nor {1} is a subset of set A. Hence, true.

**(viii)** True

All three {ϕ, {ϕ}, {1, ϕ}}** **are subset of set A. Hence, true.

**(ix)** True

{{ϕ}} is a subset of set A. Hence, true.

Answered by Sakshi | 1 year agoFind the symmetric difference A Δ B, when A = {1, 2, 3} and B = {3, 4, 5}.