The price of an article is increased by r%. The new price was decreased by r% later. Now the latest price is Rs.1.What was the original price of the article?

A

$$\frac{10000}{10000 - r^2}$$

B

$$\frac{10000 - r^2}{10000}$$

C

$$\frac{100}{100 - r^2}$$

D

$$\frac{100}{1 - r^2}$$