This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General, Subject name: Physiology
In an adult man weighing 70 Kgs, the Total body water volume will be about - 
Select and explain. 
A. 42L, B. 25L, C. 15L, D. 12L
A: 42L
Answer: A: 42L 
Explanation: Ans. A. 42L60% of body weight is composed of water. Therefore, total body water in a 70 Kg man would be 60% of 70 Kg, ie, 42 Kg, which is equivalent to 42 L.