J
U
D
A
Answer is Wrong!
Answer is Right!
The missing character is J.
The sequence is a simple alternating repetition of the letters A and J. The first letter is A, the second letter is J, the third letter is A, the fourth letter is J, and so on.
Option A: J is the correct answer.
Option B: U is not the correct answer because it is not in the sequence.
Option C: D is not the correct answer because it is not in the sequence.
Option D: A is not the correct answer because it is already in the sequence.