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: Pharmacology
Drug that can cause hyperophic pyloric stenosis is? 
Select and explain. 
A. Teacyclin, B. Erythromycin, C. Ampicillin, D. Rifampicin
B: Erythromycin
Answer: B: Erythromycin 
Explanation: o Maternal and infant use of erythromycin and other macrolide antibiotics have been repoed as risk factors for infantile hyperophic pyloric stenosis (IHPS). REF : katzung pharmacology : 14th ed