Select the number from among the given options that can replace the question mark (?) in the following series.
115, 140, 160, 175, 185, ?

The correct answer is 190.

To find the missing number that replaces the question mark (?) in the series, let's analyze the differences between consecutive terms:
115, 140, 160, 175, 185, ?

Let's calculate the difference between each term and the preceding one:
First difference: $140-115=25$
Second difference: $160-140=20$
Third difference: $175-160=15$
Fourth difference: $185-175=10$

Looking at the differences: 25, 20, 15, 10, we can see that they form a decreasing arithmetic progression where each difference decreases by 5.
Following this pattern, the next difference must be:
$10-5=5$

To find the next term (?) in the series, we add this difference to the last term (185):
$185+5=190$