If A is a proper subset of B, then A B =


Given, A is a proper subset of B


Let us consider two set as A is a proper subset of B


A = {9, 8, 7, 6, 5, 4} B = {1, 2, 3, 4, 5, 6, 7, 8, 9}


A B means we have write all the common elements of both the sets.


A B = {9, 8, 7, 6, 5, 4} {1, 2, 3, 4, 5, 6, 7, 8, 9}


= {4, 5, 6, 7, 8, 9}


The resultant set is same as A


Option A is the correct answer.

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