Assertion (A): Magnetic field due to a straight current carrying conductor is in the form of circular loops around it.
Reason (R): The magnetic field due to a current carrying conductor is weak at near points from the conductor.

Options

A. Both (A) and (R) are true and (R) is the correct explanation of (A).
B. Both (A) and (R) are true but (R) is not the correct explanation of (A).
C. (A) is true but (R) is false.
D. (A) is false and (R) is also false.

Explanation

To analyze the given assertion and reason, we will break down the statements and evaluate their validity step by step.

### Step 1: Analyze the Assertion (A)
**Assertion (A):** "Magnetic field due to a straight current carrying conductor is in the form of circular loops around it."

- The magnetic field produced by a straight current-carrying conductor indeed forms concentric circular loops around the wire. This can be visualized using the right-hand rule, where if you point your thumb in the direction of the current, your fingers will curl around the wire in the direction of the magnetic field lines.

**Conclusion for Step 1:** The assertion is **true**.

### Step 2: Analyze the Reason (R)
**Reason (R):** "The magnetic field due to a current carrying conductor is weak at near points from the conductor."

- This statement is incorrect. The magnetic field strength (B) around a straight current-carrying conductor is given by the formula:

\[ B = \frac{\mu_0 I}{2\pi r} \]

where \( \mu_0 \) is the permeability of free space, \( I \) is the current, and \( r \) is the distance from the conductor. As we can see from the formula, the magnetic field strength is inversely proportional to the distance \( r \). Therefore, the closer you are to the conductor (i.e., as \( r \) decreases), the stronger the magnetic field becomes.

**Conclusion for Step 2:** The reason is **false**.

### Final Conclusion
- Since the assertion is true and the reason is false, the correct relationship between the two is that the assertion is correct, but the reason is incorrect.

### Summary:
- Assertion (A) is **true**.
- Reason (R) is **false**.