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: Surgery
[{'content': 'Which of the following is not a component of VACTERL association \nSelect and explain. \nA. Tracheoesophageal fistula, B. Renal agenesis, C. Radial aplasia, D. Aniridia', 'role': 'user'}, {'content': 'Answer: D \nExplanation: VACTERL ASSOCIATION consists of\n\nVertebral defects\nAnorectal malformations\nCardiac defects\nTracheoesophageal fistula\nRenal agenesis\nRadial (limb) abnormality', 'role': 'assistant'}]