This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
Which of the following is not associated with Down's syndrome? 
Select and explain. 
A. Trisomy 2l, B. Mosaic 21, C. Translocation (14;21)(q10;q10),+21, D. Deletion of 2l
D: Deletion of 2l
Answer: D: Deletion of 2l 
Explanation: TRISOMY 21: DOWN SYNDROME Incidence: 1 in 700 bihs Karyotypes: Trisomy 21 type: 47,XX, +21 Translocation type: 46,XX,der(14;21)(q10;q10),+21 Mosaic type: 46,XX/47,XX, +21 (Robbins Basic Pathology, 9 th edition. page : 238)..