Question

ninety six percent of the human body is composed of the elements

a carbon, calcium, sodium, and oxygen
b sodium, potassium, hydrogen, and sulfur
c carbon, oxygen, hydrogen, and nitrogen
d carbon, iron, oxygen, and potassium
e calcium, magnesium, hydrogen, and nitrogen

Explanation:

The four most abundant elements in the human body that together make up about 96% are carbon, oxygen, hydrogen, and nitrogen. They are key components of biological molecules like proteins, carbohydrates, lipids, and nucleic - acids.

Answer:

C. Carbon, oxygen, hydrogen, and nitrogen