The correct option is
D 2401
Here, in the given series, increase sudden.
So, it must have multiplication series.
![](https://search-static.byjusweb.com/question-images/byjus/infinitestudent-images/ckeditor_assets/pictures/67900/content_24.png)
So, at the place of ? = 343
× 7
= 2401
Alternate Method
Here, in the given series, the given pattern could also be explained as
174934324017071727374