This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Medicine
True about CLL is- 
Select and explain. 
A. Can present as acute leukaemia, B. Diagnosed in routine blood test, C. Leukocytosis, D. More T lymphocytes seen
B: Diagnosed in routine blood test
Answer: B: Diagnosed in routine blood test 
Explanation: The process of diagnosing CLL usually begins with a routine blood test called a complete blood count (CBC). A CBC measures the number of different types of cells in a sample of a person's blood. A person may have CLL if the blood contains too many white blood cells. The CBC also measures red blood cells and platelets Ref Davidson 23rd edition pg 962