Detailed Instructions: In this task, you need to answer the given multiple-choice question on the general math. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.
Q: Problem: 1 , 6 , 24 , 60 , 120 , 210 , ___ ? 
Options: a ) 336 , b ) 366 , c ) 330 , d ) 660 , e ) 770
A:
a