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
Disodium cromoglycate is used by which of the following routes ? 
Select and explain. 
A. Inhalation, B. Oral, C. IV, D. IM
A: Inhalation
Answer: A: Inhalation 
Explanation: None