A. 4.51 billion years
B. 4.55 billion years
C. 4.53 billion years
D. 4.57 billion years
Submitted by: Kashif Ashraf
A. 4.51 billion years
B. 4.55 billion years
C. 4.53 billion years
D. 4.57 billion years
Submitted by: Kashif Ashraf
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