This question has statement-$1$ and statement $-2$ of the four choices given after the statements, choose the one that best describes the two statements. A metallic surface is irradiated by a monochromatic light of frequency $v>v_0$ (the threshold frequency). The maximum kinetic energy and stopping potential are ${\mathrm{K}}_{\max }$ and ${\mathrm{V}}_0$ respectively. If the frequency incident on the surface is doubled, both the ${\mathrm{K}}_{max}$ and ${\mathrm{V}}_0$ are doubled.

Statement-II The maximum kinetic energy and the stopping potential of photoelectrons emitted from a surface are linearly dependent on the frequency of incident light:

Photoelectric effect experiments are performed using three different metal plates p, q and r having work functions ${\mathrm{\varphi }}_{\mathrm{p}}=2.0\mathrm{eV},{\mathrm{\varphi }}_{\mathrm{a}}=2.5\mathrm{eV}$ and ${\mathrm{\varphi }}_{\mathrm{r}}=3.0\mathrm{eV}$ respectively, A light beam containing wavelength of $550\mathrm{nm}, 450\mathrm{nm}$ and $350\mathrm{nm}$ with equal intensities illuminates each of the plates. The correct $\mathrm{I}-\mathrm{V}$ graph for the experiment is, see Fig. $19.15$ 

Figure Fig. $19.16$ represents a graph of kinetic energy of most energetic photoelectrons ${\mathrm{K}}_{\max }$ (in $\mathrm{eV}$ ), and frequency (v) for a metal used as cathode in photoelectric experiment. The threshold frequency of light for the  photoelectric emission for the metal is 

The figure, Fig. $19.17$ shows variation of photocurrent with anode potential for a photo-sensitive surface for three different radiations. Let ${\mathrm{I}}_{{\mathrm{a}}^{\text{'}}}{\mathrm{I}}_{\mathrm{b}}$ and ${\mathrm{I}}_{\mathrm{c}}$ be the intensities and ${\mathrm{v}}_{{\mathrm{a}}^{\text{'}}}{\mathrm{v}}_{\mathrm{b}}$ and ${\mathrm{v}}_{\mathrm{c}}$ be the frequencies for the curves a, b and c respectively. Then 

In a photoelectric effect measurement, the stopping potential for a given metal is found to be ${\mathrm{V}}_0$ volt when radiation of wavelength ${\mathrm{\lambda }}_0$ is used. If radiation of wavelength $2{\mathrm{\lambda }}_0$ is used with the same metal then the stopping potential (in volts) will be

The threshold frequency for a metallic surface corresponds to an energy of $6.2\mathrm{eV}$ and the stopping potential for a radiation incident on this surface is $5 \mathrm{V}$. The incident radiation lies in