In paramagnetic materials

permanent magnetic dipoles exist but the interaction between neighbouring dipoles is negligible

permanent magnetic dipole do not exist

permanent magnetic dipoles exist and the interaction between neighbouring dipoles is very strong

permanent magnetic dipole moment may or may not exist

Assertion (A) Atomic number of sodium is 11. Reason (R) Sodium has a body centred cubic lattice.

Both A and R are true but R is not correct explanation of A

Both A and R are true and R is correct explanation of A

Both A and R are true and R is correct explanation of A

Both A and R are true but R is not correct explanation of A

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