Y shaped occlusal pattern is found in which teeth?

 # Y shaped occlusal pattern is found in which teeth?

A. Mandibular first premolar

B. Mandibular second premolar

C. Maxillary first premolar

D. Maxillary second premolar

The correct answer is B. Mandibular second premolar. 

The three cusp type mandibular second premolar manifests as a Y shaped occlusal pattern. The three-cusp type appears square lingual to the buccal cusp ridges when highly developed. Each cusp has well-formed triangular ridges separated by deep developmental grooves. These grooves converge in a central pit and form a Y shape on the occlusal surface.