The digital logic shown in the figure satisfies the given state diagram when Q1 is connected to input A of the XOR gate.Suppose the XOR gate is replaced by an XNOR gate. Which one of the following options preserves the state diagram?

• A. Input A is connected to \(\overline {Q2}\)
• B. Input A is connected to Q2
• C. Input A is connected to \(\overline {Q1} \) and S is complemented
• D. Input A is connected to \(\overline {Q1} \)