Optics: JEE Main 2022 Physics question

Using Young's double slit experiment, a monochromatic light of wavelength 5000 $\mathop A\limits^o$ produces fringes of fringe width 0.5 mm. If another monochromatic light of wavelength 6000 $\mathop A\limits^o$ is used and the separation between the slits is doubled, then the new fringe width will be :