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: Pharmacology
Which of the following drugs is commonly administered by intranasal route ? 
Select and explain. 
A. Adrenaline, B. Desmopressin, C. Ganirelix, D. Insulin
B: Desmopressin
Answer: B: Desmopressin 
Explanation: - Among the given choices, the only desmopressin is administered by the intranasal route.
- This route is being tried for Insulin, but not used presently.