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: Medicine
All of the following are examples of microdeletion syndromes, EXCEPT: 
Select and explain. 
A. Wilms' tumor-aniridia complex, B. Miller Dieker syndrome, C. Velocardiofacial syndrome, D. None of the above
D: None of the above
Answer: D: None of the above 
Explanation: The term contiguous gene syndrome refers to genetic disorders that mimic a combination of single-gene disorders. They result from the deletion of a small number of tightly clustered genes. Because some are too small to be detected cytogenetically, they are termed microdeletions. The application of molecular techniques has led to the identification of at least 18 of these microdeletion syndromes. Some of the more common ones include the Wilms' tumor-aniridia complex (WAGR), Miller Dieker syndrome (MDS), and velocardiofacial (VCF) syndrome. WAGR is characterized by mental retardation and involvement of multiple organs, including kidney (Wilm's tumor), eye (aniridia), and the genitourinary system. Ref: Harrison's principle of internal medicine 17th edition, chapter 64.