Since the specific circuit diagram is missing from the question text, we deduce the intended logic gate based on the provided probable answer and the standard NEET 2019 question it refers to. A NOR gate produces a high output (logic 1) only when both of its inputs are low (logic 0). If any or both of the inputs are high (logic 1), the output is low (logic 0). Its Boolean expression is given by $Y = \overline{A + B}$.