Light of wavelength $365\mathrm{nm}$ is incident on metals A and B of work functions $2.0\mathrm{eV}$ and $3.0\mathrm{eV}$. Use $h=6.626\times 10^{-34}\mathrm{J}\mathrm{s}$, $c=3.0\times 10^8\mathrm{m}{\mathrm{s}}^{-1}$, $1\mathrm{eV}=1.6\times 10^{-19}\mathrm{J}$. Select all correct statements.

1. AThe stopping potential for B is about 0.40 V
2. BThe ratio of stopping potentials, A : B, is 2 : 1
3. CBoth metals emit photoelectrons
4. DThe maximum kinetic energy of electrons from A is about 1.40 eV