Let us assume that both A and B are the same chronological age. (religion-online.org)
A good gifted program will be staffed with people who understand gifted children, people who recognize that gifted children may be quite advanced intellectually, but socially and emotionally be quite like any other child of the same chronological age. (verywellfamily.com)
While everyone born in the same year has the same chronological age, the bodies of different people age at different rates. (sciencedaily.com)