Experimental proof that some simple molecules like `H_2,NH_3,CH_4" and "H_2O` gave rise to amino acids during origin of life was provided by
(a) Lamarck
(b) Darwin
(c) Stanley Miller
(d) Harold Urey

Options

A. Lamarck
B. Darwin
C. Stanley Miller
D. Harold Urey

Answer

To solve the question regarding who provided experimental proof that simple molecules like H2, NH3, CH4, and H2O could give rise to amino acids during the origin of life, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for the individual who provided experimental proof related to the origin of life and the formation of amino acids from simple molecules.

2. **Analyze the Options**:
- **(a) Lamarck**: Known for his theory of evolution, not for experimental proof related to the origin of life.
- **(b) Darwin**: Famous for his theory of natural selection, but he did not conduct experiments related to the chemical origins of life.
- **(c) Stanley Miller**: Conducted the Miller-Urey experiment, which demonstrated that organic compounds, including amino acids, could be synthesized from inorganic precursors under conditions thought to resemble those of early Earth.
- **(d) Harold Urey**: Collaborated with Stanley Miller and contributed to the experiment, but he did not conduct the initial experiment that provided the proof.

3. **Identify the Correct Answer**: Based on the analysis, Stanley Miller is the one who performed the experiment that provided the proof of the chemical origin of life by showing how amino acids could form from simple molecules.

4. **Conclusion**: Therefore, the correct answer is **(c) Stanley Miller**.

### Final Answer:
(c) Stanley Miller