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: Medicine
Vitamin B level in chronic myeloid leukemia is 
Select and explain. 
A. Elevated', B. Decreased, C. Normal, D. Markedly
A: Elevated'
Answer: A: Elevated' 
Explanation: Ans. is 'a' i.e., Elevated CML there will be rise in B1, level LDH level And decreased levels of ALP.