Light of wavelength passes through a single slit of width W and forms a diffraction pattern

Question:

Light of wavelength λ passes through a single slit of width W and forms a diffraction pattern on a viewing screen. If this light is then replaced by light of wavelength 2λ, the original diffraction pattern is exactly reproduced if the width of the slit ______.
(a) Is changed to 1/4 W
(b) Is changed to 1/2 W
(c) Is changed to 2W
(d) Is changed to 4W
(e) Remains the same-no change is necessary