[amp_mcq option1=”5″ option2=”10″ option3=”50″ option4=”5000″ correct=”option1″]
The correct answer is $\boxed{\text{C}}$.
The number series is a geometric sequence with a common ratio of $5$. This means that each term is $5$ times the term before it. Therefore, the next term in the series should be $500 \times 5 = 2500$.
The number $50$ is not in the geometric sequence because it is not a multiple of $5$.