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Most of the helium of the universe was produced __________

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Most of the helium of the universe was produced __________

(a) In stars

(b) In quasars

(c) At the time the cosmic background radiation was formed

(d) First ten minutes of the expansion

I got this question in an online quiz.

My question is taken from Cosmology in section Quantum Physics of Engineering Physics I

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The correct choice is (d) First ten minutes of the expansion

The best explanation: Helium is an important fuel for the fabrication and the working of stars. Most of the helium present in the universe today was produced during the first 10 minutes of the expansion.

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