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
[{'content': "Which of the following is not associated with Down's syndrome? \nSelect and explain. \nA. Trisomy 2l, B. Mosaic 21, C. Translocation (14;21)(q10;q10),+21, D. Deletion of 2l", 'role': 'user'}, {'content': 'Answer: D \nExplanation: 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)..', 'role': 'assistant'}]