Answer: The correct answer is nitrogen, calcium and phosphorus.
Step-by-step explanation:
Elements are defined as the substances which are made out of same type of atoms. For Example: Hydrogen, Oxygen etc..
Human body is made up of various types of elements in which 6 are most abundant.
Almost 99% of the mass of human body is made up of mainly six elements. They are oxygen (O), carbon (C), hydrogen (H), nitrogen (N), calcium (Ca) and phosphorus (P).
About 0.85 % of mass of human body is composed of other 5 elements which are potassium (K), sulfur (S), sodium (Na), chlorine (Cl) and magnesium (Mg).
Hence, the correct answer is nitrogen, calcium and phosphorus.