The incorrect statements is/are

• A. The resistance offered by an inductor in a d. c circuit is always constant.
• B. The resistance of inductor in steady state is zero.
• C. An inductor is connected to a battery through a switch. The emf induced in the inductor is much larger when the switch is opened as compared to the emf induced when the switch is closed.
• D. To reduce the rate of increases of current through a solenoid should increase the time constant\[\left( \frac{L}{R} \right)\].