2 , 3 , 8 , 63 , _____ ?
A1038
B3698
C3968
D3008
A1038
B3698
C3968
D3008
Related Questions:
Refer to the given letter-cluster series and answer the question that follows.
AKMG, RTDC, WQCT, PILE, VTXF, HRXW
If in each of the letter-clusters, each letter is changed to the next letter in the English alphabetical order, how many letter-clusters thus formed will have exactly two vowels?