If we observe the single slit Fraunhofer diffraction with wavelength $\mathrm{\lambda }$ and slit width d, the width of the central maxima is 2$\mathrm{\theta }$. On decreasing the slit width for the same 

• A

  $\mathrm{\theta }\text{ increases }$

• B

  $\mathrm{\theta }\text{ remains unchanged }$

• C

  $\mathrm{\theta }\text{ decreases }$

• D

  $\mathrm{\theta } \mathrm{increases} \mathrm{or} \mathrm{decreases} \mathrm{depending} \mathrm{on} \mathrm{the} \mathrm{intensity} \mathrm{of} \mathrm{light}$