Arranging them according to the given information :
Samson, Silvester, Noah, Peter and Bruce are standing in a row facing towards the South.
(a) Samson is standing to the immediate right side side of Bruce.
(b) Silvester is standing between Noah and Peter.
Case 1 :
Case 2 :
(c) Peter is standing between Silvester and Samson.
So, Peter is in between Silvester and Samson is true.
Here, case 2 is eliminated.
Thus, 'Peter' is standing in the middle of the row.
Hence, "Peter" is the correct answer.