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': 'Most common type of psoriasis – \nSelect and explain. \nA. Plaque psoriasis, B. Psoriasis vulgaris, C. Both 1 and 2, D. Penile psoriasis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Plaque psoriasis, also known as psoriasis vulgaris is the most common type and usual form of psoriasis.', 'role': 'assistant'}]