In determining the age of an individual claiming to be older than their actual age, certain joints are typically examined to estimate bone maturity. This assessment leverages the understanding that specific bones fuse at characteristic ages as part of human development.
For a 16-year-old boy, focusing on the following joints can help corroborate his claim of being 18 years old:
Thus, the correct answer to determine the boy's age is to check the wrist and knee.