Investigators at a Crime Scene Have Isolated DNA from a Y

Multiple Choice

Investigators at a crime scene have isolated DNA from a Y chromosome and have analyzed it for its STRs.They have a prime suspect,but he is not cooperating.However,several of his relatives are willing to help by donating DNA samples.Which relative will have the most similar Y chromosome?

A) his half-brother
B) his mother's brother
C) his father's father
D) his mother's father
E) his mother's grandfather