This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pharmacology
Contraindication of Beta blockers include 
Select and explain. 
A. Bronchial asthma, B. Variant angina, C. Decompensated hea failure, D. All the above
D: All the above
Answer: D: All the above 
Explanation: Beta blockers cause bronchospasm, vasospasm absolutely contraindicated in acute or decompensated CCF except for carvedilol, hea blocck,COPD,DM.Raynauds syndrome Ref: KD Tripathi; 6th ed; Pg 139.