A  series is given with one term missing. Select the correct alternative from the given ones that will complete the series.

TDS, SIJ, RNA, QSR, ?

PXI

     T     D     S

    20    4    19

     S     I      J

    19    9     10

     R     N     A

    18    14    1

     Q     S     R

     17   19   18

     -1   +5   -9

  = 16   24    9

      P     X     I

In this 1 is subtracted from the first letter, 5 is added to the second number and 9 is subtracted from the third number.