How Many of the Pairs Listed Below Are Exact Duplicates

How many of the pairs listed below are exact duplicates?
R.S. Jilanowix - R.F. Jilanowix
E.Y. Billorian - E.Y. Billorian
S.A. Erristonier - S.A. Erristonier
Q.W. Plonianni - Q.W. Plonianni
L.K. Worthingtonham - L.K. Worthintonham

A) 1
B) 2
C) 3
D) 4
E) 5