This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autonomic nervous system, Subject name: Pharmacology
Which of the following drug is best used in urge incontinence? 
Select and explain. 
A. Oxybutinin, B. Darifenacin, C. Flavoxate, D. Tolterodine
B: Darifenacin
Answer: B: Darifenacin 
Explanation: Darifenacin, solifenacin are uroselective drugs used in urge or urinary incontinence or overactive bladder .act by inhibiting M3 receptors Ref: Goodman Gillman 11th ed pg 231-232