This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy of skin, Subject name: Dental
[{'content': 'Collagen 7 is present in which layer of Basement membrane zone \nSelect and explain. \nA. Hemi-desmosomes, B. Salt split layer, C. Lamina Densa, D. Sublamina Densa', 'role': 'user'}, {'content': 'Answer: D \nExplanation: SUBLAMINA DENSA * Contains anchoring fibrils, anchoring plaques, elastic microfibrils (without elastin), and linkin . Anchoring Fibril :- * Primary constituent is type VII collagen; appears larger than anchoring filaments and emanates perpendicularly down from lamina densa into papillary dermis. * Connects lamina densa to anchoring plaques (type IV collagen) in dermal matrix . * Intercalation with banded collagen fibrils of papillary dermis: forms fan-shaped clumps. Ref:- Sima Jain; pg num:- 8', 'role': 'assistant'}]