A Long Solenoid (Diameter = 5

A long solenoid (diameter = 5.0 cm) is wound with 960 turns per metre of thin wire through which a current of 300 mA is maintained.A wire carrying 12 A is inserted along the axis of the solenoid.What is the magnitude of the magnetic field at a point 2.0 cm from the axis?

A) 0.41 mT
B) 0.48 mT
C) 0.38 mT
D) 0.56 mT
E) 0.24 mT