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
Which of the following is not a component of VACTERL association 
Select and explain. 
A. Tracheoesophageal fistula, B. Renal agenesis, C. Radial aplasia, D. Aniridia
D: Aniridia
Answer: D: Aniridia 
Explanation: VACTERL ASSOCIATION consists of

Vertebral defects
Anorectal malformations
Cardiac defects
Tracheoesophageal fistula
Renal agenesis
Radial (limb) abnormality