In a double slit experiment, when light of wavelength 400 nm was used, the angular width of the first minima formed on a screen placed 1m away, was found to be 0.2°. What will be the angular width of the first minima, if the entire experimental apparatus is immersed in water$(\mu _{water} = \frac{4}{3})$

Question

( A ) 0.05°
( B ) 0.15°
( C ) 0.1°
( D ) 0.266°