This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Misc., Subject name: Pathology
[{'content': 'Basement membrane collagen is \nSelect and explain. \nA. IV, B. II, C. V, D. VI', 'role': 'user'}, {'content': 'Answer: A \nExplanation: (IV): (170 Harsh mohan 6th edition)Basement membrane are PAS positive amorphous structures that lies underneath epithelia of different organs and endothelial cells, they consist of collagen type IVand laminin**', 'role': 'assistant'}]