Assertion : When a bar magnet is freely suspended, it points in the north-south direction.
Reason : The earth behaves as a magnet with the magnetic field pointing approximately from the geographic south to north.

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 and reason is not the correct explanation of assertion.
C. If assertion is ture but reason is false.
D. If both assertion and reason are false.

Explanation

To analyze the given assertion and reason, we can break down the solution into clear steps:

### Step 1: Understand the Assertion
The assertion states that when a bar magnet is freely suspended, it points in the north-south direction. This is a well-known fact about bar magnets. When they are allowed to rotate freely, they align themselves along the Earth's magnetic field lines.

### Step 2: Understand the Reason
The reason provided states that the Earth behaves as a magnet with its magnetic field pointing approximately from the geographic south to north. This means that the magnetic north pole of the Earth is actually located near the geographic south pole and vice versa.

### Step 3: Analyze the Relationship
Now, we need to analyze the relationship between the assertion and the reason. The assertion is true because a freely suspended bar magnet aligns itself along the Earth's magnetic field, which does indeed point from the geographic south to the geographic north.

### Step 4: Determine the Accuracy of the Reason
However, the reason is misleading. While it is true that the Earth has a magnetic field, the statement that it points from geographic south to north is not entirely accurate. The magnetic poles of the Earth do not align perfectly with the geographic poles, and there is an angle (approximately 11.5 degrees) between them.

### Step 5: Conclusion
Thus, we conclude that:
- The assertion is true.
- The reason is false.

Therefore, the correct answer is that the assertion is true, but the reason is false.

### Final Answer
The assertion is true, and the reason is false.

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