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

💡 Solution & Explanation

Diamond has an exceptionally high melting point due to its strong, continuous three-dimensional network of covalent $sp^3$ carbon bonds, making the Assertion true. However, because these bonds are highly directional, its packing efficiency is only about 34%, which is very low, making the Reason false. Therefore, correct answer is C.