When the current in the portion of the circuit shown in the figure is 2A and increasing at the rae of 1A/s, the measured potential difference `V_(ab)=8V`. However when the current is 2A and decreasing at the rate of 1A/s, the measured potential difference `V_(ab)=4V`. The values of R and L are

Options

A. 3 ohm and 2 henry respectively
B. 2 ohm and 3 henry respectively
C. 10 ohm and 6 henry respectively
D. 6 ohm and 1 henry respectively