Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : For measuring the potential difference across a resistance of `600 Omega`, the voltmeter with resistance `1000 Omega`. will be preferred over voltmeter with resistance` 4000 Omega.`
Reason R : Voltmeter with higher resistance will draw smaller current than voltmeter with lower resistance.
In the light of the above statements, choose the most appropriate answer from the options given below

Options

A. Both A and R are correct but R is not the correct explanation of A
B. Both A and R are correct and R is the correct explanation of A
C. A is not correct but R is correct
D. A is correct but R is not correct

Answer

To solve the problem, we need to analyze both the Assertion (A) and the Reason (R) provided in the question.

### Step 1: Analyze the Assertion (A)
The assertion states that for measuring the potential difference across a resistance of 600 ohms, a voltmeter with a resistance of 1000 ohms will be preferred over a voltmeter with a resistance of 4000 ohms.

- **Understanding the Assertion**: When measuring potential difference across a resistor, the voltmeter should ideally have a high resistance to minimize the current drawn from the circuit. However, if the voltmeter's resistance is too high compared to the resistance across which it is measuring, it may not provide an accurate reading due to the loading effect.

### Step 2: Analyze the Reason (R)
The reason states that a voltmeter with higher resistance will draw smaller current than a voltmeter with lower resistance.

- **Understanding the Reason**: This statement is true. A voltmeter with higher resistance indeed draws less current from the circuit, which is generally desirable to avoid affecting the circuit's operation.

### Step 3: Evaluate the Relationship Between A and R
- The assertion (A) claims that a 1000-ohm voltmeter is preferable to a 4000-ohm voltmeter for measuring across a 600-ohm resistor. However, since the 4000-ohm voltmeter has a higher resistance than the 1000-ohm voltmeter, it would draw less current and is generally preferred for accurate measurements.
- Therefore, the assertion (A) is incorrect, while the reason (R) is correct.

### Conclusion
- Assertion A is incorrect.
- Reason R is correct.

### Final Answer
Based on the analysis, the correct answer is that Assertion A is incorrect, and Reason R is correct.