Which letter-cluster will replace the question mark (?) to complete the following series?

PGD, SEE, VCF, ?, ?

P + 3 = S $$\longrightarrow\ $$ S + 3 = V $$\longrightarrow\ $$ V + 3 = Y $$\longrightarrow\ $$ Y + 3 = B

G - 2 = E $$\longrightarrow\ $$ E - 2 = C $$\longrightarrow\ $$ C - 2 = A $$\longrightarrow\ $$ A - 2 = Y

D + 1 = E $$\longrightarrow\ $$ E + 1 = F $$\longrightarrow\ $$ F + 1 = G $$\longrightarrow\ $$ G + 1 = H

$$\therefore\ $$The next letter clusters in the given series is YAG, BYH

Hence, the correct answer is Option C