This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
Diffuse proliferative glomerulonephritis, in Lupus nephritis falls under - 
Select and explain. 
A. Class II, B. Class III, C. Class IV, D. Class V
C: Class IV
Answer: C: Class IV 
Explanation: Robbins basic pathology 9th edition page no 128,Heading =Morphology(box) Diffuse lupus nephritis (class4) is the most serious form of renal lesions in SLE and is also the most commonly encountered in renal biopsies, occuring in35%to65%of patients. It is distinguished from focal lupus nephritis (class3) by involvement of half or more of glomeruli.