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
Racemic mixture of two enantiomers with different pharmacokinetic pharmacodynamic propeies is seen in 
Select and explain. 
A. Digoxin, B. Dilantin, C. Verapamil, D. Octreotide
C: Verapamil
Answer: C: Verapamil 
Explanation: Refer Goodman and Gilman 11e p836 Verapamil is present as a racemic mixture of R and S verapamil. S verapamil has more stronger negative dromotropic action and higher first pass metabolism than R verapamil