On the basis of Miller's experiment one can say that

Options

A. organic compounds have carbon,hydorgen and oxygen
B. organic compounds can be synthesized in the laboratory
C. life originated in the from of amino acids
D. complex organic molecules were first fromed on primitive earth

Answer

### Step-by-Step Solution:

1. **Understanding Miller's Experiment**:
- Miller's experiment, conducted in 1953, aimed to simulate the conditions of the early Earth to test the hypothesis of abiogenesis, which is the origin of life from non-living matter.
- The experiment involved a mixture of gases thought to be present in the early atmosphere (methane, ammonia, hydrogen, and water vapor) and subjected them to electrical sparks to simulate lightning.

2. **Formation of Organic Compounds**:
- After running the experiment for a week, Miller analyzed the results and found that several organic compounds, including amino acids, had formed.
- This demonstrated that organic compounds could be synthesized under prebiotic conditions, supporting the idea that life could have originated from simple organic molecules.

3. **Evaluating the Options**:
- **Option A**: "Organic compounds have carbon, hydrogen, and oxygen."
- This is incorrect because the early Earth atmosphere was reducing and lacked free oxygen.
- **Option B**: "Organic compounds can be synthesized in the laboratory."
- While Miller's experiment showed synthesis of organic compounds, it does not imply that they can be synthesized in any laboratory condition, thus this option is misleading.
- **Option C**: "Life originated in the form of amino acids."
- This is also incorrect; while amino acids were formed, life is believed to have originated from more complex molecules.
- **Option D**: "Complex organic molecules were first formed on the primitive earth."
- This is the correct statement as Miller's experiment supports the notion that complex organic molecules could have formed under the conditions present on the early Earth.

4. **Conclusion**:
- Based on the findings of Miller's experiment, the correct conclusion is that complex organic molecules were first formed on the primitive Earth.

### Final Answer:
**The correct answer is: Complex organic molecules were first formed on the primitive earth.**

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