JEE Main 2020 Physics question

Radiation, with wavelength 6561 Å falls on a metal surface to produce photoelectrons. The electrons are made to enter a uniform magnetic field of T. If the radius of the largest circular path followed by the electrons is 10 mm, the work function of the metal is close to-

• (A)0.8 eV
• (B)1.6 eV
• (C)1.1 eVCorrect
• (D)1.8 eV