The correct option is B 37
3,1,4,5,9,14,23,?
In above series, next number is just the sum of previous number;
3,1,(1+3=4)or4,(4+1=5)or5,(5+4=9)or9,(9+5=14)or14,(14+9=23)or23,(23+14=37)or37
Thus final series will be;
3,1,4,5,9,14,23,37
Thus, 37 or Option "B" is correct answer.