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The usual implementation of the carry circuit involves _________

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The usual implementation of the carry circuit involves _________

(a) And & or gates

(b) XOR

(c) NAND

(d) XNOR

The question was posed to me in an online interview.

My question is taken from Fast Adders topic in division Arithmetic of Computer Architecture

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The correct option is (b) XOR

The best I can explain: In case of full and half adders this method is used.

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