Multiple Choice
What are the four most common chemical elements in the human body?
A) water,salt,protein,and fat
B) iron,carbon,oxygen,and potassium
C) blood,muscle,fat,and bone
D) collagen,glucosamine,chondroitin,and cartilage
E) oxygen,carbon,hydrogen,and nitrogen
Correct Answer:

Verified
Correct Answer:
Verified
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