what will come after
1,3,9,31,129	Choose the correct choice from the following options:
A) 451
B) 551
C) 651
D) 751
E) 851
1*1+2= 
<gadget id="calculator">1*1+2</gadget>
<output>3</output>
3   3*2+3= 
<gadget id="calculator">3*2+3</gadget>
<output>9</output>
9   9*3+4= 
<gadget id="calculator">9*3+4</gadget>
<output>31</output>
31   31*4 + 5= 
<gadget id="calculator">31*4 + 5</gadget>
<output>129</output>
129   In same logic next number will be-   129*5 + 6= 
<gadget id="calculator">129*5 + 6</gadget>
<output>651</output>
651   ANSWER:651
<result>C</result>
what will come after
1,3,9,31,129