Question

Which of the following elements have the highest percentage in terms of frequency in the Earth's crust and human body, respectively? A. Nitrogen, Oxygen B. Oxygen, Silicone. C. Carbon, Oxygen. D. Oxygen, Oxygen​

Answer 1

Oxygen as it makes up 65% of the body

Answer 2

The most abundant elements in the human body are oxygen, carbon and hydrogen. Oxygen makes up 65% of the body.