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The output $(Y)$ of the circuit shown in the figure is

1. $\overline{A} + \overline{B} +C$
2. $A + \overline{B} \cdot \overline{C} + A \cdot \overline{C}$
3. $\overline{A} +B+\overline{C}$
4. $A \cdot B \cdot \overline{C}$