This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney, Subject name: Pathology
Collapsing glomerulopathy is seen in? 
Select and explain. 
A. Post streptococcal GN, B. HIV, C. IgA nephropathy, D. Tuberculosis
B: HIV
Answer: B: HIV 
Explanation: Ans. is 'b' i.e., HIV Collapsing glomerulopathy:* It is a morphological variant of FSGS. Characterized by collapse and sclerosis of the entire glomerular tuft in addition to the usual FSGS lesions. A characteristic feature is proliferation and hypertrophy of glomerular visceral epithelial cells (podocytes). There is prominent tubular injury with formation of microcystes. It is the most characteristic lesion of HIV nephropathy.