F
K
Z
X
Answer is Wrong!
Answer is Right!
The missing character is X.
The other three characters, A, F, and K, are all in the first row of the keyboard. X is in the second row.
The other three characters, A, F, and K, are all consonants. X is a vowel.
The other three characters, A, F, and K, are all letters that are used in the English alphabet. X is a letter that is used in some other languages, but not in English.