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: Unknown
[{'content': 'Goodpasture syndrome has antibodies against: \nSelect and explain. \nA. Collagen 1, B. G-y or x-y of collagen, C. Collagen 4, D. Collagen 2', 'role': 'user'}, {'content': 'Answer: C \nExplanation: (Refer: Robbins Pathologic Basis of Disease, 8thedition, pg no: 709)', 'role': 'assistant'}]