Assertion : Fuse wire must have high resistance and low melting point.
Reason : Fuse is used for small current flow only.

Options

A. If both assertion and reason are ture and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If assertion and reason both are false.

Explanation

To solve the question regarding the assertion and reason about fuse wires, we will analyze both statements step by step.

### Step 1: Understanding the Assertion
**Assertion:** Fuse wire must have high resistance and low melting point.

- **Explanation:** A fuse wire is designed to protect electrical devices from excessive current. It has high resistance to limit the current flow under normal operating conditions. The low melting point is crucial because it allows the fuse to melt and break the circuit when the current exceeds a safe level, preventing damage to the device.

### Step 2: Understanding the Reason
**Reason:** Fuse is used for small current flow only.

- **Explanation:** This statement is misleading. While a fuse is used to protect devices from excessive current, it does not mean that it is only used for small current flows. Instead, it is designed to handle a specific maximum current. If the current exceeds this limit (which can be considered "high" relative to the device's capacity), the fuse will melt and interrupt the circuit.

### Step 3: Evaluating the Truth of Each Statement
- The assertion is **true** because a fuse wire must indeed have high resistance and a low melting point to function correctly.
- The reason is **false** because a fuse is not limited to small current flows; rather, it is meant to protect against excessive current, which can be high.

### Conclusion
- The assertion is true, while the reason is false. Therefore, the correct answer to the question is that the assertion is true, and the reason is false.

### Final Answer
- **Assertion:** True
- **Reason:** False