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
Drug that can cause hypertrophic pyloric stenosis is : 
Select and explain. 
A. Tertacycline, B. Erythromycin, C. Ampicillin, D. Rifampicin
B: Erythromycin
Answer: B: Erythromycin 
Explanation: None