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: Forensic Medicine
[{'content': 'In case of drowning in sea water: TN 06 \nSelect and explain. \nA. Hemoglobin increases, B. Hemoglobin decreases, C. No change, D. Either may occur', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Hemoglobin increases', 'role': 'assistant'}]