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Which one provides correct sequence of e...

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

A

1,2,3,4

B

2,3,1,4

C

3,4,1,2

D

4,2,3,1

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The correct Answer is:
D
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