The correct sequence for the manufacture of the compounds on the primitive earth is

Options

A. `NH_(3),CH_(4)` protein and carbohydrate
B. Protein , carbohydrate, water and nucleic acid
C. `NH_(3). CH_(4)`, carbohydrate and nucleic acid
D. `NH_(3)`, carbohydrate, protein and nucleic acid.

Answer

To determine the correct sequence for the manufacture of compounds on primitive Earth, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Initial Conditions**:
- On primitive Earth, the atmosphere was reducing and lacked free oxygen. The primary gases present included methane (CH₄), ammonia (NH₃), water vapor (H₂O), and hydrogen (H₂).

2. **Formation of Simple Compounds**:
- The first step in the sequence involves the formation of simple organic compounds from these inorganic gases. The gases, such as ammonia and methane, would have undergone chemical reactions under the unstable climatic conditions.

3. **Synthesis of Carbohydrates**:
- From these simple compounds, carbohydrates (sugars) would be formed next. Carbohydrates serve as a source of energy and are fundamental for the development of more complex biomolecules.

4. **Formation of Amino Acids**:
- Following the formation of carbohydrates, amino acids would be synthesized. Amino acids are the building blocks of proteins and are essential for the formation of more complex structures.

5. **Formation of Nucleic Acids**:
- Finally, the most complex molecules, nucleic acids (such as DNA and RNA), would be formed. Nucleic acids require a sugar, a phosphate group, and a nitrogenous base, making their formation more complex than that of carbohydrates and proteins.

### Correct Sequence:
- **1st**: Ammonia (NH₃)
- **2nd**: Carbohydrates (sugars)
- **3rd**: Amino acids (which form proteins)
- **4th**: Nucleic acids

Thus, the correct sequence for the manufacture of compounds on primitive Earth is: **Ammonia → Carbohydrates → Amino Acids → Nucleic Acids**.