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
[{'content': 'The most abundant glycoprotein present in basement membrane is - \nSelect and explain. \nA. Laminin, B. Collagen type IV, C. Fibronectin, D. Heparin sulphate', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Laminin and Collegen type IV form tightly bound networks in basement membrane', 'role': 'assistant'}]