Magnetic Effect...

A needle made of bismuth is suspended freely in a magnetic field. The angle which the needle makes with the magnetic field is

From the statements of Assertion and Reason mark the correct answer from the options.

(a) If both assertion and reason are true, and reason is the correct explanation of assertion.
(b) If both assertion and reason are true, but reason is not the correct explanation of assertion.
(c) If assertion is true, but reason is false.
(d) If both assertion and reason are false.

Assertion: Diamagnetic materials can exhibit magnetism.
Reason: Diamagnetic materials have permanent magnetic dipole moment.

In the following question, a statement of Assertion is given, followed by a corresponding statement of Reason. Of the statements, mark the correct answer as:

(a) If both assertion and reason are true and the reason is the correct explanation of assertion.
(b) If both assertion and reason are true but the reason is not the correct explanation of the assertion.
(c) If assertion is true but reason is false.
(d) If both assertion and reason are false.

Assertion: The true geographic north direction is found by using a compass needle.
Reason: The magnetic meridian of the earth is along the axis of its rotation.