The second order Bragg diffraction of `X` rays with `lambda=Å` form a set of parallel planes in a metal occurs at an angle `60^(@)`. the distance between the scattering planes in the crystal is
A. `0.575 overset(@)A`
B. `1.00 overset(@)A`
C. `2.00overset(@)A`
D. `1.15overset(@)A`