Which of These Lists Contains Only Trace Elements

Question

Which of these lists contains only trace elements?
A) sulfur, chlorine, oxygen
B) selenium, hydrogen, calcium
C) boron, oxygen, carbon
D) silicon, fluorine, tin
E) cobalt, calcium, sodium

Accepted Answer

Trace elements are those required by an organism in only minute quantities. Silicon, fluorine, and tin fit this description, whereas the elements listed in the other options are either too abundant in organisms (e.g., oxygen, carbon, calcium) or not universally considered trace elements.