| X-rays are used for study of crystal structure because |
| (a)X-rays are completely absorbed by the Crystal |
(b)The wavelength of X-rays is of the same order of magnitude as the interatomic spacing in crystals  |
| (c)The wavelength of X-rays is very small in comparison with the inter atomic spacing in crystal |
| (d)The crystals are completely transparent to X-rays |
