This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urea cycle, Subject name: Biochemistry
[{'content': 'Blood Urea Nitrogen is decreased in: \nSelect and explain. \nA. Hypo-ammonemia, B. Hyper-ammonemia, C. Hyperventilation, D. Hypoventilation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Blood Urea Nitrogen is decreased in urea cycle defects,where Hyper-ammonemia occurs C/f of urea cycle defects:- Increased blood glutamine Decreased BUN (Blood Urea Nitrogen) Cerebral oedema Vomiting Lethargy Blurred vision Slurred speech & hyperventilation. Note:-Severe ammonia toxicity can lead to coma and eventually death.', 'role': 'assistant'}]