The output $$Y$$ of a $$2$$ $$-$$ bit comparator is logic $$1$$ whenever the $$2$$-bit input $$A$$ is greater than the $$2$$-bit input $$B.$$ The number of combination for which the output is logic $$1$$, is

Consider the given circuit. In this circuit, the race around

The state transition diagram for the logic circuit shown is

The impedance looking into nodes 1 and 2 in the given circuit is