What three numbers come after this sequence? why?

question: 5, 30, 155, 780, …

a. 3905, 19530, 97655

b. 905, 1020, 1145

c. 1415, 2040, 2675

d. 3065, 18690, 96815

Here, the difference between the consecutive number is: 25, 125, 625, 3125

Which are squares of 5, 15, 25

So, next term would be:3905, 19530, 97655

In short, Your Answer would be Option A

Hope this helps!

Ithink it’s a as the answer.