What is the most distinctive feature of ape dentition,which clearly distinguishes apes from Old World monkeys?

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The Y-5 molar pattern is the most distinctive feature of ape dentition, which sets them apart from Old World monkeys. This pattern is characterized by five cusps arranged in a Y-shape in the molars, whereas Old World monkeys have only four cusps arranged in a bilophodont pattern. The other options are not unique to apes and are shared with other primate groups.

What Is the Most Distinctive Feature of Ape Dentition,which Clearly