This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General surgery, Subject name: Anatomy
Water content in infant - 
Select and explain. 
A. 60-70%, B. 75-80%, C. 50-60%, D. 80-90%
B: 75-80%
Answer: B: 75-80% 
Explanation: The highest percentage of Total Body Water is found in newborns, with approximately 80% of their total body weight comrpised of water. This decreases to about 65% by 1 year of age and therafter remains fairly constant through childhood