An NPN transistor is used in common emitter configuration as an amplifier with 1 kΩ load resistance. Signal voltage of 10 mV is applied across the base-emitter. This produces a 3 mA change in the collector current and 15 μA change in the base current of the amplifier. The input resistance and voltage gain are:

• A. 0.33 kΩ, 1.5
• B. 0.67 kΩ, 300
• C. 0.67 kΩ, 200
• D. 0.33 kΩ, 300