Consider the following:
1. Carbon
2. Hydrogen
3. Oxygen
4. Calcium
5. Nitrogen
Which among the following is the correct decreasing order of average percentage of the above elements in Human Body?

Answer: [C] 3 1 2 5 4

Average percentage by mass of the elements in the human body is oxygen (65.0%), carbon (18.0%), hydrogen (10 .0%), nitrogen (3.0%) and calcium (2.0%), phosphorous (1.0%), potassium (0.35%), sulphur (0.25%), sodium (0.15%), chlorine (0.15%), magnesium (0.05%) and iron (0.004%). Besides these, there are also traces of iodine, fluorine, copper, silicon, etc. present.

This question is a part of GKToday's Integrated IAS General Studies Module