Question

identify the type of input mode for the op amp
select one:
a. common mode
b. dual ended differential mode
c. single ended differential mode

Explanation:

In common mode operation, the same input voltage is applied to both the inverting (-) and non-inverting (+) terminals of the op-amp, which matches the configuration shown where $V_{in}$ is connected to both inputs. Dual ended differential mode uses different voltages on each input, while single ended differential mode has one input driven and the other grounded.

Answer:

a. Common mode