This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
In an average young adult male, water constitutes about ______ % of the body weight. 
Select and explain. 
A. 40, B. 50, C. 60, D. 70
C: 60
Answer: C: 60 
Explanation: Body is composed of about 60-70% water.
Osmolality of the intra and extracellular fluid is the same, but there is a marked difference in the solute content.