A: Every magnetic configuration magnetic field north pole and south pole.
R: North pole, south pole exists only if the source of the field has net magnetic dipole moment.

Options

A. If both Assertion & Reason are the true and the reason is the correct explanation of the assertion, then mark (1)
B. If both Assertion & Reason are true but the reson is not the correct explanation of the assertion, then mark (2)
C. If Assertion is true statement but Reason is false, then mark (3)
D. If both Assertion and Reason are false statements, then mark (4)

Answer

To solve the question, we need to analyze both the assertion (A) and the reason (R) provided.

### Step-by-Step Solution:

1. **Understanding the Assertion (A)**:
- The assertion states that "Every magnetic configuration must have a North Pole and a South Pole."
- This is based on the fundamental principle that magnetic monopoles (isolated magnetic poles) do not exist in nature. Every magnetic field configuration that we observe has both a North and a South pole.

2. **Understanding the Reason (R)**:
- The reason states that "North pole and south pole exist only if the source of the field has a net magnetic dipole moment."
- A magnetic dipole moment is a vector quantity that represents the strength and orientation of a magnetic source. If a configuration has a net magnetic dipole moment, it will exhibit both North and South poles.

3. **Analyzing the Assertion**:
- Since magnetic monopoles do not exist, every magnetic configuration must indeed have both a North and a South pole. Therefore, the assertion is correct.

4. **Analyzing the Reason**:
- The reason is also correct because a magnetic dipole moment is necessary for the existence of North and South poles. If there is no net dipole moment, the configuration cannot be considered magnetic, and thus, North and South poles would not exist.

5. **Conclusion**:
- Both the assertion and the reason are correct. However, the reason does not fully explain the assertion. The assertion is a broader statement about magnetic configurations, while the reason is specific to the conditions under which poles exist.

### Final Answer:
- Assertion (A) is correct.
- Reason (R) is correct but does not adequately explain the assertion.