Concept:Paternity testing works by comparing the inherited DNA of the child with that of the alleged father.
Explanation:Every child receives half of its DNA from the biological mother and half from the biological father.
A DNA test compares specific genetic markers between the child and the alleged father.
A close match at these markers confirms paternity with nearly 100% accuracy.
Blood group tests can only exclude a possible father, but they cannot confirm paternity with certainty.
Finger printing is useful for personal identification but does not establish biological relationships.
Tongue rolling is a simple inherited trait and is far too unreliable for resolving paternity disputes.
Therefore, the most accurate method is the DNA test.
Answer:C. DNA test