Cosmic Panspermia theory was proposed by

Options

A. Plato
B. Reddi
C. Arrhenius
D. Thales

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the proponent of the Cosmic Panspermia theory. This theory suggests that life on Earth may have originated from microorganisms or biochemical compounds that came from outer space.

2. **Identifying the Options**: The options provided are:
- 1st: Plato
- 2nd: Reddy
- 3rd: Arrhenius
- 4th: Thales

3. **Analyzing Each Option**:
- **Plato**: An ancient Greek philosopher known for his works in philosophy and ethics, not for theories related to the origin of life.
- **Reddy**: There is no significant historical figure in the context of panspermia theory by this name.
- **Arrhenius**: Svante Arrhenius was a Swedish scientist who proposed the panspermia theory, suggesting that life could be distributed throughout the universe via comets, meteoroids, and other celestial bodies.
- **Thales**: An ancient Greek philosopher who is considered one of the first pre-Socratic philosophers, but he did not propose the panspermia theory.

4. **Conclusion**: Based on the analysis, the correct answer is **Arrhenius**, as he was the one who proposed the Cosmic Panspermia theory.

5. **Final Answer**: The Cosmic Panspermia theory was proposed by **Arrhenius**.

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