A single slit diffraction experiment is immerged completely in water without changing any other parameter. How is width of central maximum affected ?

In a single-slit diffraction experiment, the width of the slit is made half of the original width:

In a single-slit diffraction experiment, the width of the slit is made half of the original width:

In a single slit diffraction experiment, the width of the slit is made double its original width. Then the central maximum of the diffraction pattern will become

In a single slit diffraction experiment, the width of the slit is made double its original width. Then the central maximum of the diffraction pattern will become

In single slit diffraction experiment, the width of the central maximum inversely proportional to

Width of slit in a single slit diffraction experiment such that 20 maxima of double slit interference pattern are obtained within central maxima of the diffraction pattern is ( Slit separation for double slit arrangement =2mm)

In single sit diffraction experiment, the width of the central maximum inversely proportional to