Q2.23

Consider the following state table for a sequential machine. The number of states in the minimized machine will be

$$\begin{array}{|l|l|ll|}\hline \text{} & \text{} & \textbf{Input}\\\hline && \text{0} & \text{1} \\\hline \textbf{Present State} & \textbf{A} & \text{D,0} & \text{B,1} \\ \text{} & \textbf{B} & \text{A,0} & \text{C,1}\\ & \textbf{C} & \text{A,0} & \text{B,1} \\ \text{} & \textbf{D} & \text{A,1} & \text{C,1} \\\hline \text{} & \text{} & \textbf{Next state, Output}\\\hline \end{array}$$