assertion : a solenoid tends to expand, when a current passes through it.

reason : two straight parallel metallic wires carrying current in same direction attract each other.

A. both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.
C. Assertion is True but the Reason is False.
D. both Assertion & Reason are false.