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 chromosomal disorder in patau Syndrome is: 
Select and explain. 
A. Chromosome 21, B. Chromosome 18, C. Chromosome 13, D. Chromosome 45x / 46xx
C: Chromosome 13
Answer: C: Chromosome 13 
Explanation: (Chromosome 13) (593-G) (615-Ghai 7th)* Down syndrome - 21* Edwards syndrome - 18* Patau syndrome - 13* Turner's syndrome - 45X/ 46XX* Klinefelter syndrome - 47XXY