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
[{'content': "TRUE statement about nonrenal cause of hypokalemia among the following is: \nSelect and explain. \nA. Loss of K in sweat is a usual cause of hypokalemia, B. Direct gastric losses of K+ due to vomiting or nasogastric suctioning is minimal, C. Hypochloremic alkalosis due to vomiting results in persistent kaliuresis due to secondary hypoaldosteronism, D. Colonic pseudo-obstruction (Ogilvie's syndrome) is due to hyperkalemia", 'role': 'user'}, {'content': "Answer: B \nExplanation: Hypokalemia can be due to increased loss. Non renal causes are 1. Gastrointestinal loss (Diarrhea) 2. Integumentary loss (Sweat) MUST KNOW: The loss of K+ in sweat is very low except in extremes of physical exeion Direct gastric losses of K+ is also minimal (Vomiting, NG aspiration) It can lead to hypochloremic alkalosis It lead to persistent kaliuresis due to secondary hyperaldosteronism Celiac disease, ileostomy, villous adenoma, VIPomas, and chronic laxative cause significant hypokalemia Colonic pseudo-obstruction (Ogilvie's syndrome) can lead to hypokalemia from secretory diarrhea Ref: Harrison, Edition-18, page- 352.", 'role': 'assistant'}]