In a control system, a summing point with two inputs A and B produces an output Y . What is the output of the summing point if both inputs A and B are positive?

Correct option is B

​$$\text{In a control system block diagram, a summing point algebraically adds its input signals.} \\[6pt]\bullet \ \text{If both inputs } A \text{ and } B \text{ are positive, they are added directly.} \\[6pt]\text{Hence, the output is:} \\[6pt]Y = A + B \\[8pt]\text{Subtraction occurs only if one input is marked with a negative sign.}$$​​