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': 'A 30 year old known SLE female presents with ankle swelling. Her BP is 170/100 mmHg and she has marked lower limb edema. Urine dip stick discloses 4+ proteins with no hematuria. Plasma creatinine is 1.4 mg/dl, albumin is 1.5 g/dl and urine protein excretion rate was 6 gms for 24 hours. What is the cause of this presentation? \nSelect and explain. \nA. Amyloidosis, B. Class II lupus nephritis, C. Class V lupus nephritis, D. Pericardial effusion', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]