What does the following combination of gates produce?

Step-by-step solution

From the given logic circuit diagram: The output of gate G₁ (NOT gate) is A . The output of gate G₂ (NOT gate) is B . These are fed as inputs to gate G₃ , which is a NOR gate. The output of G₃ is: Y' = A + B This output is then fed to gate G₄ , which is another NOT gate. The final output Y is: Y = Y' = A + B Y = A + B Using De Morgan's theorem, we can write: A + B = A B The boolean expression Y = A B represents a NAND gate. Answer: NAND gate