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: Medicine
[{'content': 'This works inaccurately in presence of <img src=" /> \nSelect and explain. \nA. All the below, B. Nail polish, C. Methernoglobinemia, D. Skin pigmentation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: .', 'role': 'assistant'}]