Question

which substance is a compund

A.) Li
B.) N2
C.) H2
D.) CO2

Atoms of what two elemts are in a every organic compound 

A.) calicum and helium
B.) carbon and oxygen
C.) cobalt and hydrogen  
D.) carbon and Hydrogen

Answer 1

Answers:
______________________________________________
  1)   [D]:  " CO₂ " .  

Note:  This is the only answer choice given that is composed of:  "at least two different elements" .
_______________________________________________
  2)  [D]:  "carbon and hydrogen" {"C" and "H" .} .
_______________________________________________