Select the correct alternative to replace the ?
$371531:5112347::7153163:?$

The correct option is B $9$ $19$ $39$ $79$
3 7 15 31
So, the next number is twice the previous number plus 1
and for next series i.e., 5 11 23 47 we add 2
Similarly for 7 15 31 63 it will be 9 19 39 79.