# Acute angled cusps in permanent maxillary first molar are:
A. Distobuccal and mesiolingual
B. Mesiobuccal and distolingual
C. Mesiobuccal and distobuccal
D. Mesiolingual and distolingual
The correct answer is B. Mesiobuccal and distolingual.
Explanation:
In the permanent maxillary first molar:
The mesiobuccal and distolingual cusps form acute angles.
The mesiolingual and distobuccal cusps form obtuse angles.
These acute and obtuse angles contribute to the rhomboid-shaped occlusal outline typical of the maxillary first molar.
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