Assertion (A) : After the huge explosion, the universe expanded and hence, the temperature came down and hydrogen and helium formed sometime later.
Reason (R) : The gases condensed under gravitation and formed the galaxies of the present day universe

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If both A and R are true, and the R is the correct explanation of the A

If both A & R are false

If A is true, but R is false

If both A and R are true, and the R is not the correct explanation of the A

answer is B.

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Detailed Solution

The Big Bang Theory attempts to explain to us the origin of the universe. It is a singular huge explosion unimaginable in physical terms. The universe expanded and hence, the temperature went down. Hydrogen and Helium formed sometime later. The gases condensed under gravitation and formed the galaxies of the present day universe.

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