Today’s Human Body Composition quiz.
Three chemical elements make up most of the human body: O (65%), C (18%), and ??
| A | Hydrogen (10%) |
| B | Nitrogen (3%) |
| C | Calcium (2%) |
| D | Sodium (1%) |
Answer
Hydrogen
Explanation
The missing element is Hydrogen, which makes up approximately 10% of the human body’s composition.