This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pharmacology
Amyl nitrate is used by which route 
Select and explain. 
A. Oral, B. Inhalation, C. Intravenous, D. Intramedullary
B: Inhalation
Answer: B: Inhalation 
Explanation: Refer katzung 11e p195 DOSAGE & ADMINISTRATION: With the patient in recumbent or seated position a capsule of amyl nitrite is held away from the face, crushed between the fingers, and held under the patient's nose. Two to six inhalations of the vapors from the capsule are usually sufficient to promptly produce therapeutic effects.