Dental In posterior teeth, cusp tip is the best site for EPT. The response is best at which of the following cusp: A Distobuccal. B Mesiobuccal. C Mesiolingual. D Distolingual. 💡 Explanation In posterior teeth, cusp tip is the best site for EPT. The response is best at which of the following cusp: ✓ Correct Answer: B. Mesiobuccal.