Which one provides correct sequence of events in origin of species according to Darwinism ?
1. Natural selection
2. Variations and their inheritance ?
3. Survival of fittest
4. Struggle for existence

Options

A. a,b,c,d
B. b,d,c,a
C. d,b,c,a
D. b,c,a,d

Answer

To determine the correct sequence of events in the origin of species according to Darwinism, we can follow these steps:

### Step-by-Step Solution:

1. **Struggle for Existence**: The first event in Darwin's theory is the struggle for existence. This refers to the competition among individuals for limited resources such as food, space, and mates. This struggle is essential for natural selection to occur.

2. **Variations and Their Inheritance**: The second event is the presence of variations among individuals within a species. These variations can be inherited from one generation to the next. Variations are crucial because they provide the raw material for natural selection.

3. **Survival of the Fittest**: The third event is the concept of "survival of the fittest." This means that individuals with traits that are better suited to their environment are more likely to survive and reproduce. This is a result of the previous two events.

4. **Natural Selection**: The final event is natural selection, which is the process through which the traits that enhance survival and reproduction become more common in the population over generations. It is the mechanism that drives evolution.

### Correct Sequence:
Thus, the correct sequence of events according to Darwinism is:
- 4. Struggle for existence
- 2. Variations and their inheritance
- 3. Survival of the fittest
- 1. Natural selection

So, the correct answer is **4, 2, 3, 1**.