Which waves are used for $LASIK$ surgery?

Which of the following statements is wrong?

Which of the following electromagnetic waves has the shortest wavelength?

$Ultraviolet$ radiations are used in $LASIK$ surgery.

Why does human skin darken when exposed to sunlight for a long period of time?

The terminology of different parts of the electromagnetic spectrum is given in the text. Use the formula $E = hv$ (for energy of a quantum of radiation: photon) and obtain the photon energy in units of $eV$ for different parts of the electromagnetic spectrum. In what way are the different scales of photon energies that you obtain related to the sources of electromagnetic radiation?