Gaseous mixture used by Miller for synthesis of amino acids through heat and electric discharge included
A. Methane B. Ammonia
C. Hydrogen D. Water vapours

Options

A. A and B
B. B, C and D
C. B and C
D. A, B, C and D

Answer

To solve the question regarding the gaseous mixture used by Miller for the synthesis of amino acids through heat and electric discharge, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Experiment**: The Miller-Urey experiment aimed to simulate the conditions of early Earth to test the hypothesis of abiogenesis, which is the origin of life from non-living matter.

2. **Identify the Gases Used**: In the experiment, Miller used a mixture of gases that were believed to be present in the early Earth's atmosphere. These gases included:
- Methane (CH₄)
- Ammonia (NH₃)
- Hydrogen (H₂)
- Water vapor (H₂O)

3. **Recognize the Purpose of the Gases**: The combination of these gases was subjected to electric discharges to mimic lightning, which provided the energy needed for chemical reactions to occur, leading to the formation of amino acids.

4. **Conclusion**: Since all four gases (methane, ammonia, hydrogen, and water vapor) were used in Miller's experiment, the correct answer to the question is that all options A, B, C, and D are included in the gaseous mixture.

### Final Answer:
All of the above gases (A. Methane, B. Ammonia, C. Hydrogen, D. Water vapors) were included in the gaseous mixture used by Miller.

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