JEE Main 2019 Physics question

If the de Broglie wavelength of an electron is equal to times the wavelength of a photon of frequency Hz, then the speed of electron is equal to: (Speed of light = m/s, Planck's constant = J.s, Mass of electron = kg)

• (A) m/s
• (B) m/sCorrect
• (C) m/s
• (D) m/s