This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
All of the following conditions are known to cause diabetes insipidus except- 
Select and explain. 
A. Multiple sclerosis, B. Head injury, C. Histiocytosis, D. Viral encephalitis
A: Multiple sclerosis
Answer: A: Multiple sclerosis 
Explanation: Causes of Central Diabetes insipidus Causes of Nephrogenic Diabetes insipidus Multiple sclerosis causes primary polydipsia ( Harrison 17 pg 2218 ) Ref image - pumed.com , researchgate.net