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.

MET : NGW :: SAF : TCI :: YEL : ?

ZGO

Pattern followed is :

MET : NGW                      ::                SAF : TCI

M(13) + 1 = (14)N                            S(19)  + 1 = (20)T

E(5) + 2 = (7)G                                A(1)   + 2 =  (3)C

T(20) + 3 = (23)W                            F(6)    + 3 = (9)I

Similarly ,

YEL : ?

Y(25) + 1 = (26)Z

E(5)  + 2 = (7)G

L(12) + 3 = (15)O

ZGO , is correct answer .