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

💡 Solution & Explanation

In anti-ferromagnetic substances, the magnetic moments of adjacent domains are aligned in opposite directions in equal numbers, cancelling each other out completely to give a net zero magnetic moment (Assertion is true). MnO is a classic example of an anti-ferromagnetic material (Reason is true). However, merely stating an example does not explain *why* the magnetic moment is zero. Therefore, correct answer is B.