# <span lang="EN-US

We know that two sets A and B are equal if every element in A belongs to B and every element in B belongs to A.

(i) First three natural numbers are 1, 2, 3.

A = B

(ii) First three natural numbers are 1, 2, 3.

A ≠ B

(iii) C = {a, b, c, d}

D = {d, c, a, b}

C = D

(iv) D = {d, c, a, b}

F = set of vowels = {a, e, i, o, u}

D ≠ F

(v) F = set of vowels = {a, e, i, o, u}

A = {1, 2, 3}

F ≠ A

(vi) D = {d, c, a, b}

E = (a, e, i, o, u}

D ≠ E

(vii) F = set of vowels = {a, e, i, o, u}

B = first three natural numbers = {1, 2, 3}

F ≠ B

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