Optical fibre. communication is generally preferred over general communication system because

Options

A. it is more efficient
B. of signal security
C. both (a) and (b)
D. none of these

Answer

To solve the question regarding why optical fiber communication is generally preferred over general communication systems, we can break down the reasoning into clear steps:

### Step 1: Understand the advantages of optical fiber communication
Optical fiber communication has several advantages over traditional communication systems. These advantages include:

1. **Higher Bandwidth**: Optical fibers can carry a larger amount of data compared to copper wires.
2. **Less Signal Attenuation**: Signals in optical fibers experience less loss over long distances, allowing for clearer communication.
3. **Immunity to Electromagnetic Interference**: Optical fibers are not affected by electromagnetic interference, which can disrupt signals in traditional systems.
4. **Security**: It is more difficult to tap into optical fibers compared to copper wires, providing better security for the transmitted data.
5. **Lightweight and Flexible**: Optical fibers are lighter and more flexible than traditional cables, making them easier to install and manage.

### Step 2: Analyze the options given in the question
The question provides four options regarding the preference for optical fiber communication. We need to evaluate these options based on the advantages discussed:

1. **Option A**: It is more efficient.
2. **Option B**: It has signal security.
3. **Option C**: Both A and B.
4. **Option D**: None of the above.

### Step 3: Determine the correct answer
From our analysis of the advantages of optical fiber communication:

- **Option A** is correct because optical fibers are indeed more efficient due to their higher bandwidth and less signal loss.
- **Option B** is also correct because optical fibers provide better signal security compared to traditional systems.
- Therefore, **Option C** (Both A and B) is the most comprehensive and correct answer.

### Final Answer
The correct option is **C: Both A and B**.

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