This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Asthma, Subject name: Pharmacology
Which of the following drug is safe for cardiovascular patient who experience an acute attack of asthma? 
Select and explain. 
A. Ipratropium, B. Salbutamol, C. Terbutaline, D. Formoterol
A: Ipratropium
Answer: A: Ipratropium 
Explanation: Ans. A. IpratropiumInhaled beta 2 agonist are the drug of choice for terminating the acute attack of asthma. But a patient suffering from heart disease, there receptors are blocked. So the alternative treatment for acute attack can be anticholinergic or methylxanthine.