This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anaesthesia
False about ropivacaine 
Select and explain. 
A. Less cardiotoxic than bupivacaine, B. More cardiotoxic than lignocaine, C. Contains only R enantiomer, D. Onset of action is faster than bupivacaine
D: Onset of action is faster than bupivacaine
Answer: D: Onset of action is faster than bupivacaine 
Explanation: Ropivacaine contains only S enantiomer so cardiotoxicity is less than bupivacaine (but still higher than lignocaine). Anaesthetic propeies (onset, intensity; duration of I action) of ropivacaine are almost similar to bupivacaine.