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
Leucopenia occurs in the following except: 
Select and explain. 
A. Measles, B. Viral hepatitis, C. Typhoid, D. Bacterial endocarditis
D: Bacterial endocarditis
Answer: D: Bacterial endocarditis 
Explanation: None