Since the circuit diagram is missing from the question text, we deduce its function based on the provided probable answer and the standard NEET 2020 problem. The circuit typically consists of a NOR gate with both of its inputs inverted (passed through NOT gates). The Boolean expression for such a circuit is $Y = \overline{\overline{A} + \overline{B}}$. According to De Morgan's theorem, this simplifies to $Y = \overline{\overline{A}} \cdot \overline{\overline{B}} = A \cdot B$, which represents an AND gate. An AND gate produces a high output (logic 1) only when both inputs A and B are high (logic 1). For all other input combinations, the output is low (logic 0).