Select the option that is related to the fifth letter-cluster in the same way as the second letter-cluster is related to the first letter-cluster and the fourth letter-cluster is related to the third letter-cluster.

OILS : UNLS :: PAIN : PKDT :: QUIK : ?

MKXU

Pattern followed here is :

OILS : UNLS                                 &             PAIN : PKDT

O(15) + 4 = (19)S                                    P(16)+ 4 = (20)T

I(9)+3 = (12)L                                         A(1)+3 = (4)D

L(12)+2 = (14)N                                      I(9)+2 = (11)K

S(19)+2 = (21)U                                        N(14)+ 2 = (16)P

SLNU :- in reverse order =UNLS        TDKP :- in reverse order = PKDT

Similarly ,

QUIK : ?

Q(17)+4 = (21)U

U(21)+3 = (24)X

I(9)+2 = (11)K

K(11)+2 = (13)M

UXKM :- in reverse order = MKXU

MKXU is correct answer .