A: The maximum possible magnetization of a paramagnetic sample is of the same order of magnitude as the magnetization of a ferromagnet.
R: Saturation of paramagnetic substnaces requires imparactically high magnetising fields.

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 analyze the given statements, we will break down the assertion (A) and the reason (R) step by step.

### Step 1: Understand the Assertion (A)
The assertion states that "The maximum possible magnetization of a paramagnetic sample is of the same order of magnitude as the magnetization of a ferromagnet."

1. **Definition of Magnetization**: Magnetization (M) is defined as the magnetic moment per unit volume of a material.
2. **Paramagnetic vs. Ferromagnetic Materials**:
- Paramagnetic materials have a small and positive susceptibility to magnetic fields, which means they can be magnetized in the presence of an external magnetic field but do not retain magnetization once the field is removed.
- Ferromagnetic materials have a much larger susceptibility and can retain their magnetization even after the external field is removed, leading to much higher saturation magnetization values.

### Step 2: Analyze the Reason (R)
The reason states that "Saturation of paramagnetic substances requires impractically high magnetizing fields."

1. **Saturation Magnetization**: This is the maximum magnetization that a material can achieve in the presence of a magnetic field.
2. **High Magnetizing Fields for Paramagnets**: In paramagnetic materials, achieving saturation magnetization requires very high magnetic fields compared to ferromagnetic materials, which can reach saturation at relatively lower fields.

### Step 3: Evaluate the Truth of A and R
1. **Is Assertion A True?**:
- While the maximum magnetization of a paramagnetic sample can be comparable to that of a ferromagnet, it is typically much lower in practice due to the nature of the materials. Thus, the assertion is somewhat misleading.

2. **Is Reason R True?**:
- Yes, it is true that paramagnetic materials require very high magnetic fields to reach saturation magnetization.

### Conclusion
- The assertion (A) is not entirely accurate as it suggests a direct comparison without considering the practical differences in magnetization levels.
- The reason (R) is correct as it accurately describes the conditions under which paramagnetic materials achieve saturation.

### Final Evaluation
Both the assertion and the reason are not entirely correct in the context provided. Therefore, the correct choice would be that the assertion is false, but the reason is true.