This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Biochemistry
[{'content': 'This patient came to clinic with this defect, it is in? \nSelect and explain. \nA. Methylation, B. DNA replication, C. Nucleotide Excision Repair, D. Protein folding', 'role': 'user'}, {'content': 'Answer: C \nExplanation: This patient present feature of Xeroderma Pigmentosum Nucleotide Excision Repair Exposure to UV rays damages DNA due to production of convalent linkages between adjacent pyrimidines. Normally the damaged DNA is repaired by excision and repair. In xeroderma pigmentosa the repair of UV damaged DNA is defective. Ref : Lippincott 5th ed', 'role': 'assistant'}]