Refer to the circuit in the following figure 1. Select the correct approximate output signal from figure 2. Figure 1 2 k 30 V - 30 V 12 V (h) Figure 2 30 V A IK 12 V- - 12 V (a) (b) 12 V - 12 V 30 V 30 V (s) Select one: O a. Figure d O b. Figure b O c. Figure a O d. Figure c