Magnetic Properties Of Materials

In a permanent magnet, at room temperature, the individual magnetic moments of the molecules are non-zero, but the domains (regions where magnetic moments are aligned) are not fully aligned. Some random thermal motion prevents the perfect alignment of the domains. This results in a net magnetic moment for the magnet, but not all the domains are perfectly aligned. Therefore, the correct answer is (C).

So, the correct answer is (C): Domains are partially aligned.