Read the Assertion and Reason below and choose the correct option. — Solid State Chemistry Question

💡 Solution & Explanation

In a close-packed arrangement of $N$ spheres, exactly $N$ octahedral voids are generated. These voids are formed by the overlapping of two oppositely oriented triangular depressions from adjacent close-packed layers, placing them effectively midway between these layers, which geometrically dictates their 1:1 ratio with the spheres. Therefore, correct answer is A.