Assertion : Crystalline solids can cause Xrays to diffract.
Reason : Interatomic distance in crystalline solids is of the order of 0.1 nm.

Options

A. Both 'A' and 'R' are true and 'R' is the correct explanation of 'A'.
B. Both 'A' and 'R' are true and 'R' is not the correct explanation of 'A'
C. 'A' is true and 'R' is false
D. 'A' is false and 'R' is true

Answer

A