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: Medicine
Calculate water deficit for 50 kg male with Na=160 meg 
Select and explain. 
A. 2.9 L hypeonic saline, B. 2.9 L half normal saline, C. 1.5 L 5% dextrose in water, D. 1.5 L 10% dextrose in water
B: 2.9 L half normal saline
Answer: B: 2.9 L half normal saline 
Explanation: Ans. is 'b' i.e., 2.9L half normal saline