The correct option is C Premolars
Primary Dentition is the first teeth to erupt into the oral cavity. It is made up of central incisors, lateral incisors, canines, first molars, and secondary molars. Permanent teeth are what replaces the primary teeth and remain throughout. All of the teeth are replaced with identical sets, except first and secondary molars, they are replaced by premolars. Therefore premolars are the point of difference.