​A magnetic compass consists of: ​

Correct option is B

​The correct answer is (b) a tiny magnetic needle attached to an aluminium pointer​

Explanation: 

• A compass is a small but very useful navigating instrument.
• It contains a freely suspended magnet.
• This magnet displays the direction of the horizontal component of the Earth's magnetic field at that point.
• The magnetic compass is the most important and reliable instrument.