Explanation Correct Answer: A. Metoclopramide
[Harrison’s 18th Ed. 304]
Metoclopramide is a combined 5-HT4 agonist & D2 antagonist. Domperidone is a D2 antagonist.
Erythromycin increases gastroduodenal motility by action on receptors for motilin. Somatostatin analogue octreotide induces propagative small intestinal motor complexes.