Which of the following statements is correct?

Options

A. Series arrangement must be used for domestic circuits.
B. Parallel arrangement is not used in domestic circuits
C. In parallel arrangement same current will flow through out the circuit.
D. Series arrangement is not used for domestic circuits.

Explanation

To determine which of the statements regarding electrical circuits is correct, we will analyze the statements provided and understand the principles of series and parallel circuits.

### Step-by-Step Solution:

1. **Understanding Series and Parallel Circuits**:
- In a **series circuit**, all components are connected end-to-end, forming a single path for current to flow. If one component fails, the entire circuit is interrupted.
- In a **parallel circuit**, components are connected across common points or junctions, creating multiple paths for current to flow. If one component fails, the others can still operate.

2. **Analyzing the Statements**:
- **Statement 1**: "Series arrangement must be used for domestic purposes."
- This statement is incorrect because if one appliance in a series circuit fails, all appliances stop working.
- **Statement 2**: "Parallel arrangement must be used for domestic purposes."
- This statement is correct because parallel circuits allow multiple appliances to operate independently. If one appliance fails, the others continue to function.
- **Statement 3**: "In a parallel arrangement, the same current flows through the circuit."
- This statement is incorrect. In a parallel circuit, the total current is divided among the branches. The current through each branch can vary.
- **Statement 4**: "In a series arrangement, the same current flows through the entire circuit."
- This statement is correct. In a series circuit, the same current flows through all components.

3. **Conclusion**:
- The correct statement regarding the use of series and parallel arrangements in domestic circuits is that **parallel arrangements must be used for domestic purposes**. This ensures that appliances can operate independently and receive the same voltage supply.

### Final Answer:
The correct statement is: **Parallel arrangement must be used for domestic purposes.**

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