Question

What are the major constituents of universe?
a. Nitrogen and oxygen
b. Hydrogen and oxygen
Hydrogen and Helium
d. Helium and Nitrogen​

Answer 1

Answer:

Hydrogen and helium are the main constituents of the universe. Carbon is also an abundant material but there is no option for that.

Answer 2

Answer:

hydrogen and helium

Step-by-step explanation:

thus is your answer