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The planets of our solar system formed about how many billion years ago?
A2.5
B4.6
C13.7
D5.6
Answer & Solution
Correct answer: B. 4.6
1. The nebula collapsed 5 to 5.6 billion years ago.
2. Planets formed about 4.6 billion years ago.
3. All planets formed in the same period.
_Source: NCERT Class 11 Fundamentals of Physical Geography, Chapter 2, The Origin and Evolution of the Earth._
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