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: Unknown
BCR ABL gene mutation is seen in ? 
Select and explain. 
A. CML, B. AML, C. CLL, D. ALL
A: CML
Answer: A: CML 
Explanation: ANSWER: (A) CMLREF: Robbins 7th ed p. 697BCR gene on chromosome 9 gets translocated to ABL gene on chromosome 22 leading to the formation of a fusion protein with a tyrosine kinase activity.