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86. Two 4-bit comparators are cascaded to form an 8-bit comparator. The cascading inputs of the most significant 4 bits should be connected ________.
(a) to the outputs from the least significant 4-bit comparator
(b) to the cascading inputs of the least significant 4-bit comparator
(c) A = B to a logic high, A < b and a > B to a logic low
(d) ground
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