# Logic Gates – 177

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177. Which of the following equations would accurately describe a 4-input OR gate when A = 1, B = 1, C = 0, and D = 0?

(a) 1 + 1 + 0 + 0 = 1
(b) 1 + 1 + 0 + 0 = 01
(c) 1 + 1 + 0 + 0 = 0
(d) 1 + 1 + 0 + 0 = 00

Explanation
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