Select the option that is related to the third letter-cluster in the same way as the second letter-cluster is related to the first letter-cluster.
RDPC : NHLG :: SKDG : ?
RDPC : NHLG
R -4 =N
D + 4 = H
P - 4 = L
C + 4 = G
Following the same pattern, we get the desired result.
S (19) - 4 = O (15)
K (11) + 4 = O (15)
D (4) - 4 = Z (26)
G (7) + 4 = K (11)
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