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B
Not Gate
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C
NAND gate
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D
XOR Gate
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Solution
The correct option is A Or Gate Out put of first NOR gate Y′=¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯A+B Output of second NOR gate with both its input terminals connected together y=y′=¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯A+B=A+B