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1. The maximum positive and negative numbers which can be represented in 2's complement form using n bits are respectively
(A): +(2n + 1 - 1), - (2n - 1 - 1)
(B): +(2n + 1 - 1), - 2n - 1
(C): +2n + 1, - (2n - 1 + 1)
(D): +2n - 1, - 2n - 1
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