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
Which of the following condition is not known to cause diabetes insipidus? 
Select and explain. 
A. Head injury, B. Histiocytosis, C. Multiple sclerosis, D. Viral encephalitis
C: Multiple sclerosis
Answer: C: Multiple sclerosis 
Explanation: Multiple sclerosis