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: Dental
A 10 years old female patient diagnosed as a case of
down's syndrome having mosaicism variety.

The syndrome is usually associated with 
Select and explain. 
A. Congenital heart lesions, B. Respiratory disorders, C. Endocrinal abnormalities, D. Cleft lip and Palate
A: Congenital heart lesions
Answer: A: Congenital heart lesions 
Explanation: None