To creat a 5-bit parallel adder with no input carry we require

9 Ex-OR gates, 8 AND gates and 4 OR gates

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9 Ex-OR gates, 4 AND gates and 5 OR gates

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9 Ex-OR gates, 4 AND gates and 4 OR gates

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9 Ex-OR gates, 9 AND gates and 4 OR gates

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Solution

The correct option is D 9 Ex-OR gates, 9 AND gates and 4 OR gates
To create 5 bit parallel adder, we require 4-full adder plus 1 half adder. For 4 full adder, we require 8 Ex-OR gates, 8 AND gates and 4-OR gates. And for 1 Half adder we require only 1 EX-OR gate and one AND gate. Thus finally for 5-bit adder we require 9 Ex-OR gates, 9 AND gates and 4 OR gates.

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