This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cell and Tissue Regeneration, Subject name: Pathology
[{'content': 'Most abundant fibrillary collagen in basement membrane is? \nSelect and explain. \nA. Type 1, B. Type 2, C. Type 3, D. Type 4', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans is 'd' i.e. Type 4 o Laminin and Collegen type IV form tightly bound networks in basement membrane.Type of collagenDistributionType ISkin, tendon, bone, corneaType IIArticular cartilage, intervertebral disc, Vitreous humorType IIIFetal skin, cardiovascular systam, lung, reticular fiberType IVBasement membrane ^Type VPlacenta, skin", 'role': 'assistant'}]