A Young's Double Slit Has a Slit Separation of 1

Multiple Choice

A Young's double slit has a slit separation of 1.65 × 10−⁵ m on which a monochromatic light beam is directed.The resultant bright fringes on a screen 1.10 m from the double slit are separated by 2.25 × 10−² m.What is the wavelength of this beam? (1 nm = 10−⁹ m)

A) 6.90 nm
B) 205 nm
C) 337 nm
D) 338 nm
E) 408 nm