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 one of the following drugs is not contraindicated in bronchial asthma? 
Select and explain. 
A. Morphine, B. Propanolol, C. Stropine, D. Nitroglycerine
D: Nitroglycerine
Answer: D: Nitroglycerine 
Explanation: None