In which one of the following mixed dentition analysis of deciduous dentition, there is no use of radiographs?

Moyer’s analysis  This mixed dentition analysis utilises Moyer’s prediction tables. Prediction is based on the premise that there is a reasonably good correlation between the size of erupted permanent incisors and the unerupted canines and premolars. It is a non-radiographic method. The main advantage of non-radiographic prediction methods is that they can be performed by measuring the erupted mandibular incisor(s) without the need of additional measurements from radiographs. Reference: Orthodontics: Diagnosis and Management of Malocclusion and Dentofacial Deformities 3rd O P Kharbanda, pdf no 841