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Question:

To get an output of 1 from the circuit shown in the figure, the input must be:

a=0,b=0,c=1

a=1,b=0,c=1

a=0,b=1,c=0

a=1,b=0,c=0

Solution:

To get final output as 1, the output of OR gate must be 1 and C must be 1. So, a = 1, b = 0 or a = 0, b = 1.