Question

what two primary elements formed in the early universe? *
carbon and oxygen
iron and nickel
nitrogen and argon
hydrogen and helium

Explanation:

In the early universe, through the process of Big - Bang nucleosynthesis, hydrogen and helium were the first and most abundant elements formed. Other elements like carbon, oxygen, iron, nickel, nitrogen, and argon were formed later through processes in stars (stellar nucleosynthesis).

Answer:

D. Hydrogen and helium