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: Pathology
Heroin abuse causes ? 
Select and explain. 
A. Focal segmental glomerulonephritis, B. Cresent glomerulonephritis, C. Membraneus glomerulonephritis, D. Diffuse glomerulonephritis
A: Focal segmental glomerulonephritis
Answer: A: Focal segmental glomerulonephritis 
Explanation: Answer- A. Focal segmental glomerulonephritisClinically it presents as nephrotic syndrome.CausesHIV infectionHeroin addictionSickle cell diseaseMassive obesityIgA nephropathyReflux nephropathyIdiopathic