DNA fingerprinting was performed on a human skeleton (S) to identify a missing person reported by four different families (F1, F2, F3 and F4). Four short tandem repeat (STR) loci were independently PCR-amplified using DNA isolated from the family members and $\mathbf{S}$. The diagram represents PCR products after gel electrophoresis showing the four STR loci (red, blue, yellow and black coloured lines). Based on these results, the family to which $\mathbf{S}$ relates is

• Correct answer
  A

  F3
• B

  F4
• C

  F1
• D

  F2

Hence, the correct answer is option: 'A'.