Following are the main steps in origin of life according to modern theory
A. Free atoms
B . Origins of simple organic compound
C. Origin of prebiotic molecules
D. Origin of simple inorganic compound
E . Origin of complex organic compound
F . Prokaryotes
What is correct sequence starting from oldest to latest ?

Options

A. A,D,B,E,C,F
B. A,B,E,D,C,F
C. A,D,B,C,E,F
D. A,C,B,E,D,F

Answer

To determine the correct sequence of the steps in the origin of life according to the modern theory, we need to analyze the steps provided and arrange them from the oldest to the latest.

### Step-by-Step Solution:

1. **Identify the oldest step**: The first step in the origin of life is the presence of **free atoms**. These are the basic building blocks of matter and existed before any compounds formed.

2. **Next step**: After free atoms, the next phase involves the formation of **simple inorganic compounds**. These compounds are formed from the combination of free atoms.

3. **Formation of simple organic compounds**: Following the simple inorganic compounds, the next step is the **origin of simple organic compounds**. This includes the formation of basic organic molecules such as amino acids and sugars.

4. **Complex organic compounds**: After the formation of simple organic compounds, the next step is the **origin of complex organic compounds**. This involves the formation of larger molecules or polymers, such as proteins and polysaccharides.

5. **Prebiotic molecules**: The next step is the **origin of prebiotic molecules**. These are more complex structures that may have led to the development of life-like systems.

6. **Prokaryotes**: Finally, the last step in this sequence is the **origin of prokaryotes**, which are the simplest forms of life and represent the earliest living organisms.

### Correct Sequence:
- A. Free atoms
- D. Origin of simple inorganic compounds
- B. Origin of simple organic compounds
- E. Origin of complex organic compounds
- C. Origin of prebiotic molecules
- F. Prokaryotes

### Final Answer:
The correct sequence from oldest to latest is:
**A → D → B → E → C → F**

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