10. यदि A = {1 2, 5} तथा B = {3, 4, 5, 9}, तब AdeltaB बराबर है।
(a) {1, 2, 5, 9}
(b) {1, 2, 3, 4, 9}
(c) 1, 2, 3, 4, 5, 9)
(d) इनमें से कोई नहीं
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{1,2,3,4,9}
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