This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
Drug used for acute severe asthma is 
Select and explain. 
A. MGS04, B. Cromolyn sodium, C. Anti leukotriene, D. Cyclosporine
A: MGS04
Answer: A: MGS04 
Explanation: Magnesium produce broncho dilatationRef:Harrison 17th ed Pg 1605