This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, Subject name: Anatomy
Beta 2 selective agonist are often effective in 
Select and explain. 
A. Angina due to cornary insufficiency, B. Asthama, C. Delayed labour, D. All the above
B: Asthama
Answer: B: Asthama 
Explanation: Ref-KDT 6/e p127 Beta 2 agonist are useful in premature uterine contraction to delay labour and not for delayed labour. Beta blockers are used in the treatment of the angina