What are the Four Most Common Chemical Elements in the Human

Question

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

Accepted Answer

The four most common elements in the human body are oxygen, carbon, hydrogen, and nitrogen. These elements are found in many different molecules that make up the body's tissues, including proteins, carbohydrates, lipids, and nucleic acids. While water and salt are important components of the body, they are not chemical elements. Iron, potassium, and other elements are present in smaller amounts and have specific functions in the body, but they are not among the most common. Blood, muscle, fat, and bone are different types of tissues in the body, but they do not represent specific chemical elements. Collagen, glucosamine, chondroitin, and cartilage are all important components of connective tissues, but they are not elements either.