When one end of an iron bar is placed near a compass:

Options

A. it is always the norh pole of the compass that points towards it
B. it is always the south pole of the compass that points towards it
C. any one of the poles of the compass would point towards it
D. the compasss will remain unaffected by the iron bar

Explanation

### Step-by-Step Solution:

1. **Understanding the Setup**: When one end of an iron bar is placed near a compass, we need to analyze how the compass reacts to the magnetic field produced by the iron bar.

2. **Compass Behavior**: A compass consists of a small magnet (the needle) that can rotate freely. The needle has two poles: a north pole and a south pole. The north pole of the compass needle is attracted to the Earth's magnetic north.

3. **Magnetic Properties of Iron Bar**: An iron bar can become magnetized when it is placed in a magnetic field. Depending on how the iron bar is magnetized, one end will act like a north pole and the other end will act like a south pole.

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