All of the following conditions are known to cause diabetes insipidus except-: (A) Multiple sclerosis, (B) Head injury, (C) Histiocytosis, (D) Viral encephalitis
Answer is A. 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