MHT CET Physics question

In a certain double slit experimental arrangement interference fringes of width 1.0 mm each are observed when light of wavelength 5000 Å is used. Keeping the set up unaltered, if the source is replaced by another source of wavelength 6000 Å, the fringe width will be

• (A)1.2 mmCorrect
• (B)1.5 mm
• (C)1.8 mm
• (D)2.0 mm