Since the specific logic circuit diagram is missing from the question, we deduce the equivalent gate based on the provided probable answer. A typical logic gate combination from this NEET 2015 problem that represents an AND gate consists of two inputs A and B being inverted (usually via NOT gates or NOR/NAND gates with tied inputs) before being fed into a NOR gate. The output of the NOR gate with inverted inputs is given by $Y = \overline{\overline{A} + \overline{B}}$. Using De Morgan's theorem, this simplifies to $Y = \overline{\overline{A}} \cdot \overline{\overline{B}} = A \cdot B$, which is the standard Boolean expression for an AND gate.