Select the correct statements :
I) In the following circuit emf is 2V and internal resistance of the cell is $1\mathrm{\Omega }$  and $\mathrm{R} = 1\mathrm{\Omega }$ , then reading of the voltmeter is 1V.
 

II) $\mathrm{V} = \mathrm{E}-\mathrm{ir}$where $\mathrm{E}=2\mathrm{V},\mathrm{i}=\frac{2}{2}=1\text{ and }\mathrm{R}=1\mathrm{\Omega }$.
III) The electric bulbs glows immediately when switch is ON.