Mammalian teeth aresunk in sockets thus mammalian teeth are thecodont.
Acrodont: describes the teeth of some reptiles that have no roots and are joined to the jawbone
Homodont: used to describe vertebrates that have teeth that are all similar in shape, as in most nonmammalian vertebrates
Polyphyodont: is any animal whose teeth are continually replaced
Answer : (c)