This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hypeension, Arrhythmias, Dyslipidemia, Subject name: Pharmacology
All of the following are features of metoprolol in comparison to propanolol EXCEPT 
Select and explain. 
A. It is ineffective in suppressing muscle tremor, B. It is safer in diabetics, C. It is less likely to cause bradycardia, D. It is less likely to worsen Raynaud's disease
C: It is less likely to cause bradycardia
Answer: C: It is less likely to cause bradycardia 
Explanation: Metoprolol is a cardio-selective b-blocker and thus is safer than nonselective blockers ( propanolol) in diabetics, asthmatics and the patients of peripheral vascular disease (e.g. Raynaud's disease). Due to lack of b2-blocking action, it cannot suppress muscle tremors. Potential to cause bradycardia is similar to non-selective b-blockers. Drugs possessing ISA (like pindolol) are less likely to cause bradycardia.