Which of the following numbers will replace the question mark (?) in the given series?
12, 14, 31, 97, 393, ?
A1970
B1972
C1971
D1965
A1970
B1972
C1971
D1965
Related Questions:
What would come at the place of question mark in the number series ?
2 , 10 , 30 , 68 , ?