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: Dental
[{'content': 'Keratohyaline granules are found in: \nSelect and explain. \nA. St. granulosum, B. St. spinosum, C. St. basale, D. Prickle cell layer', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]