Which method of separation is not the correct method for obtaining butter from curd?

Options

A.
B.
C.
D. None of these

Explanation

To determine which method of separation is not correct for obtaining butter from curd, we will analyze the three methods mentioned in the question.

### Step-by-Step Solution:

1. **Understanding the Process of Butter Extraction:**
- Butter is obtained from curd through a process of churning, which involves separating the fat (butter) from the liquid (buttermilk) present in the curd.

2. **Analyzing the First Method:**
- The first method describes using a filter (sieve) to separate butter from curd.
- When curd is poured into a sieve, the viscosity of the curd prevents it from passing through the small holes of the sieve.
- Therefore, this method is ineffective for extracting butter from curd as the curd itself will not flow through the filter.

3. **Analyzing the Second Method:**
- The second method involves using a stirrer in a container (mud) to churn the curd.
- As the stirrer rotates, it creates a centrifugal force that pushes the butter to the outer surface of the container.
- This method is effective for extracting butter from curd, as it allows for proper churning.

4. **Analyzing the Third Method:**
- The third method involves using a mixer or juicer to churn the curd.
- Similar to the second method, the blades of the mixer create a rotational motion, which generates centrifugal force.
- This also effectively separates the butter from the curd, making it a valid method for butter extraction.

5. **Conclusion:**
- The first method (using a filter) is not a correct method for obtaining butter from curd, as it does not allow for the separation of butter due to the high viscosity of curd.

### Final Answer:
The method that is not correct for obtaining butter from curd is **using a filter (sieve)**.

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