1.

Assertion (A): The regular or irregular stacking of atoms has importanteffect on properties of materials.Reason (R): The arrangement of atoms in a given material can be studied using X-rays.

A. Both A and R are true and R is correct explanation of A
B. Both A and R are true but R is not correct explanation of A
C. A is true but R is false
D. A is false but R is true
Answer» C. A is true but R is false


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