The first pediatric radiographic survey may not be necessary until:

a. all primary teeth have erupted and prevent a visual inspection of interproximal surfaces.
b. the arches have developed sufficiently to accommodate placement of the image receptor.
c. the age of 6, when cooperation is more likely.
d. the child presents with signs or symptoms of oral disease.

a. The selection criteria guidelines suggest that the first radiographic survey may not be necessary until all the primary teeth have erupted, preventing a visual inspection of the proximal (contact) surfaces via a clinical inspection.