When a resistor of `11Omega` is connected in series with an electric cell. The current flowing in it is 0.5A. Instead when a resistor of `5Omega` is connected to the same electric cell in series, the current increases by 0.4A. The internal resistance of the cell is

Options

A. `1.5Omega`
B. `2Omega`
C. `2.5Omega`
D. `3.5Omega`

Answer

C