Electron was discovered by

Options

A. Albert Einstein
B. J.C. Bose
C. J.J. Thomson
D. Bohr

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks who discovered the electron.

2. **Recall Historical Context**: The discovery of the electron is a significant event in the field of physics and is attributed to a specific scientist.

3. **Identify the Scientist**: The scientist who is credited with the discovery of the electron is J.J. Thomson.

4. **Understand the Method of Discovery**: J.J. Thomson discovered the electron through experiments conducted with cathode rays. He used a cathode ray tube to demonstrate that cathode rays are composed of negatively charged particles, which he named electrons.

5. **Conclude the Answer**: Therefore, the correct answer to the question is J.J. Thomson.

**Final Answer**: Electron was discovered by J.J. Thomson.

---