താഴെ പറയുന്ന ശ്രേണിയിലെ അടുത്ത സംഖ്യയേത് ? 3, 12, 30, 66 ______
A264
B90
C138
D300
A264
B90
C138
D300
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?