<prompt> As per Anderson and DAlonzo classification the most dangerous type of odontoid fracture isType IType IIType IIIType IV  <response>: Anderson and DAlonzo classification for odontoid fracture Type I : Avulsion of tip .Type II : Fracture at junction of odontoid process and axis.Type III : Fracture through the body of axis.Treatment according to classification Type I : ConservativelyType II : Most dangerous type, treated with screw fixationType III : Conservatively 