In a young's double slit experiment distance between slits is d = 1 mm, Wavelength of light used is 600 nm and distance of screen from the plane of slits is D = 1 m. The minimum distance between two points on the screen where intensity falls to 75 % of maximum intensity will be (Assume both sources of equal power).

A

0.1 mm

B

0.2 mm

C

0.45 mm

D

0.9 mm