S
Q
M
X
Answer is Right!
Answer is Wrong!
The missing character is X.
The other three characters, A, S, and M, are all letters that appear in the alphabet twice. X is the only letter that appears only once in the alphabet.
Here is a table showing the number of times each letter appears in the alphabet:
Letter | Number of appearances
——- | ——–
A | 2
B | 1
C | 2
D | 2
E | 3
F | 1
G | 2
H | 1
I | 3
J | 1