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# NAND and NOR gates are called universal gates because theyare universally available.can be easily manufactured.can be combined to produce OR, AND and NOT gates.are widely used in the integrated circuits.

A
are widely used in the integrated circuits.
B
can be easily manufactured.
C
can be combined to produce OR, AND and NOT gates.
D
are universally available.
Solution
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#### The truth table for AND gate is as shown in the figure. Thus, the output of an AND gate is 1 if and only if both inputs 'A' and 'B' are 1.

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