This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urinary tract, Subject name: Pathology
According to WHO, membranous glomerulonephritis seen in SLE is - 
Select and explain. 
A. Class II, B. Class III, C. Class IV, D. Class V
B: Class III
Answer: B: Class III 
Explanation: The morphological classification of lupus nephritis has proven to be clinically useful. Five patterns are recognized: minimal mesangial(class1); mesangial lupus glomerulonephritis (class II); focal proliferative glomerulonephritis (class III); diffuse proliferative glomerulonephritis (class IV); and membranous glomerulonephritis (class V) From Pathologic basis of disease ROBBINS, 8th edition, pg no:217