<prompt>  A 30 year old known SLE female presents with ankle swelling. Her BP is 170100 mmHg and she has marked lower limb edema. Urine dip stick discloses 4 proteins with no hematuria. Plasma creatinine is 1.4 mgdl, albumin is 1.5 gdl and urine protein excretion rate was 6 gms for 24 hours. What is the cause of this presentation?AmyloidosisClass II lupus nephritisClass V lupus nephritisPericardial effusion 