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Sun has burned half of hydrogen in:

Question: Sun has burned half of hydrogen in:
  • A. 3 billion years
  • B. 4.6 billion years ✓
  • C. 5.5 billion years
  • D. 6.1 billion years
Correct Answer: B. 4.6 billion years
Explanation: The Sun, about 4.6 billion years old, has consumed roughly half its hydrogen fuel.

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