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: Pediatrics
[{'content': 'Which of the following nasal spray is very effective in control of enuresis – \nSelect and explain. \nA. Pitressin, B. Desmopressin, C. Lipressin, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]