This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Primary Immunodeficiency, Subject name: Pediatrics
Class IV lupus nephritis is: 
Select and explain. 
A. Mesangial lupus nephritis, B. Proliferative lupus nephritis, C. Membranous lupus nephritis, D. Diffuse lupus nephritis
D: Diffuse lupus nephritis
Answer: D: Diffuse lupus nephritis 
Explanation: Classification of Lupus Nephritis Class I Minimal Mesangial Lupus Nephritis Class II Mesangial Proliferative Lupus Nephritis Class III Focal Proliferative Lupus Nephritis Class IV Diffuse Proliferative Lupus Nephritis Class V Membranous Lupus Nephritis Class VI Advanced Sclerotic Lupus Nephritis