The logic gate shown in the circuit diagram is:

Circuit diagram showing a logic gate (represented by a rectangle) with inputs A and B, and output Y. The gate is connected to a +5V supply and a resistor R connected to ground.
The LED is connected to the output Y. The LED is labeled "LED" and indicates that "1 = Glow".
(a) OR
(b) NOR
(c) NAND
(d) AND