GENERAL KNOWLEDGE

Detailed explanation-1: -These were mainly helium and hydrogen, which are still by far the most abundant elements in the universe. Present observations suggest that the first stars formed from clouds of gas around 150–200 million years after the Big Bang.

Detailed explanation-2: -Hydrogen and helium atoms emerged a measly 379, 000 years after the Big Bang. As the hot, dense plasma of protons, electrons and photons that was the universe began to cool and expand, electrons and protons gathered to form atoms.