13, 4
13, 5
4, 13
9, 4 E. 4, 4
Answer is Right!
Answer is Wrong!
The answer is $\boxed{\text{C. }4, 13}$.
In this sequence, each number is repeated, then 9 is subtracted to get the next number. So the next pair of numbers is $13 – 9 = 4$, followed by $13$.
Option A is incorrect because $13$ is not followed by $4$.
Option B is incorrect because $13$ is not followed by $5$.
Option C is correct because $13 – 9 = 4$, followed by $13$.
Option D is incorrect because $9$ is not followed by $4$.
Option E is incorrect because $4$ is not followed by $4$.