I would have to say the answer is C.
A is incorrect since hydrogen is not an air pollutant.
B is incorrect because ozone is most definitely one of the top.
And D has cyanide which is a chemical for suicide during wars.
Hope this helps!
Her physician prescribes calcitonin to strengthen the woman's bones, since calcitonin is rich in calcium content and calcium helps keep the bones healthy.
That statement is True
Incorrect use of drugs could cause an overdose, which could eventually lead to death
Incorrect use of dietary supplements ( lets say you take different type of supplements without knowing what you're doing) , could create a toxic result for your body, which also could eventually lead to death
