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: Pathology
Down's syndrome is associated with -a)  Congenital heart diseaseb)  A.L.L.c)  Early onset Alzheimer's diseased) CNS tumoure)  Infection 
Select and explain. 
A. abce, B. bcde, C. cde, D. acd
A: abce
Answer: A: abce 
Explanation: None