The question presents two statements about how a juvenile's age is determined and asks which combination of true and false is correct. Statement I claims the ossification test is the final test for age, and Statement II claims statutory documents like a birth certificate are given precedence. Each option needs to be tested against how age determination actually works.
Only the combination where Statement I is false and Statement II is true reflects the actual hierarchy used in determining a juvenile's age.
Therefore, the correct answer is Only Statement II is true.