Few of the letters are given followed by a question mark (?) these letters are following a specific pattern you have to give the correct option which can replace question mark.
AA, BB, DD, GG, ?
Show answer & explanation
Correct answer: A
Explanation
Position of letters:
A = 1
B = 2 (+1)
D = 4 (+2)
G = 7 (+3)
Now the next difference is +4:
7 + 4 = 11
11th letter = K
So the next term is KK.