A. carbon, oxygen, nitrogen, sulfur
B. carbon, oxygen, hydrogen, nitrogen
C. carbon, oxygen, sulfur, phosphorus
D. carbon, sulfur, hydrogen, magnesium
Correct Answer: carbon, oxygen, hydrogen, nitrogen ✔
Last Updated: October 12, 2016
A. carbon, oxygen, nitrogen, sulfur
B. carbon, oxygen, hydrogen, nitrogen
C. carbon, oxygen, sulfur, phosphorus
D. carbon, sulfur, hydrogen, magnesium
Correct Answer: carbon, oxygen, hydrogen, nitrogen ✔
Last Updated: October 12, 2016