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Question

Universe originated about .............. years ago.
  1. 15 million
  2. 20 billion
  3. 4.5 billion
  4. 3.4 billion

A
4.5 billion
B
20 billion
C
3.4 billion
D
15 million
Solution
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The universe is very old and originated about 20 billion years ago according to Big Bang theory. The universe is the cluster of galaxies which contain stars and clouds of gas and dust.

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