Pleurodont teeth have long roots with weak attachments to the mandible. There is no socket for the teeth to be placed on the jaw.
Monophyodont teeth mean the presence of only one set of teeth for the entire lifetime.
Homodont means the presence of a single type of teeth.
None of these characters are observed in human dentition.
The thecodont teeth are the type of teeth containing the base of the tooth which is completely immersed inside the socket present on the jawbone.
Diphyodont teeth are the presence of two sets of teeth throughout the entire lifecycle.
Human dentition shows the thecodont and diphyodont character. But the homodont character is not observed.
Heterodont teeth mean the presence of different types of teeth with different functions.
Human dentition does not have the pleurodont character, but it is both diphyodont and heterodont.
Human dentition is thecodont because of the presence of sockets in the jawbone where the teeth are embedded.
Human dentition shows a diphyodont character because of the presence of two sets of teeth throughout the life cycle. The first set is called the deciduous teeth and the second set is the permanent teeth.
Human dentition shows heterodont character because of the presence of four types of teeth which are incisors, canine, premolars and molars.
Hence, the correct answer is option (D).