D
S
G
M
Answer is Wrong!
Answer is Right!
The missing character is S.
The sequence is a simple alternating repetition of the letters A, B, C, and D. The first letter is A, the second letter is B, the third letter is C, and the fourth letter is D. The fifth letter is A, the sixth letter is B, and so on.
The missing character is the letter that comes after D in the sequence. The letter that comes after D is S.
The other options are incorrect because they are not letters that come after D in the sequence.