Find the term which does not fit into the series.
1CV, 5FU, 9IT, 15LS, 17OR
A 5FU
B 15LS
C 9IT
D 17OR
option a can be the correct answer as "FU" from 5FU in the original order and reverse order contain the same position
option a can be the correct answer as "FU" from 5FU in the original order and reverse order contain the same position