This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Racemic mixture of two enantiomers with different pharmacokinetic and pharmacodynamic properties is seen in: 
Select and explain. 
A. Dilantin, B. Digoxin, C. Verapamil, D. Octreotide
C: Verapamil
Answer: C: Verapamil 
Explanation: None