This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genetics And Genetic Disorders, Subject name: Pediatrics
The following clinical features are seen in which disease? 
Select and explain. 
A. Turner syndrome, B. Fragile X-syndrome, C. Achondroplasia, D. Down syndrome
D: Down syndrome
Answer: D: Down syndrome 
Explanation: d. Down syndromeA - Mongoloid slant, epicanthic foldB - Single transverse palmar (simian) creaseC - Sandle gapAll these are seen in Down syndrome