Select the number from among the given options that can replace the question mark (?) in the following series.
5, 5, 15, 75, ?, 4725

Let's evaluate the mathematical operations between consecutive terms in the series:
5×1=5

5×3=15

15×5=75

The multipliers are consecutive odd numbers: 1,3,5,…
The next multiplier must be 7:

75×7=525
Let's double-check by applying the next consecutive odd number (9) to 525:

525×9=4725
This matches the final term perfectly. Hence, the missing number is 525.