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': 'If urine dipstick shows +3, what is the protein level in mg/dl in urine \nSelect and explain. \nA. 30 mg/dl, B. 50 mg/dl, C. 100 mg/dl, D. 300 mg/dl', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Answer-D. 300 mg/dl1+ = 30mg/dl2+ = 100mg/dl3+ = 300mg/dl4+ = 1000mg/dl', 'role': 'assistant'}]