Who invented electric bulb ?

Options

A. Einstein
B. Thomas Alva Edison
C. Charles Babbage
D. none of these.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the inventor of the electric bulb. This is a historical inquiry into who created this important invention.

2. **Identifying the Inventor**: The inventor of the electric bulb is Thomas Alva Edison. He is widely recognized for his contributions to the development of electric lighting.

3. **Explaining the Invention**: The electric bulb, also known as the incandescent light bulb, works by converting electrical energy into heat and light energy. When electricity passes through the filament inside the bulb, it heats up and produces light.

4. **Conclusion**: Therefore, the answer to the question "Who invented the electric bulb?" is Thomas Alva Edison.

**Final Answer**: Thomas Alva Edison invented the electric bulb.

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