The correct option is A G S M O
The first letter of each term has a difference of 2 letters
A,A+2=C,C+2=E,E+2=G
The second letter of each term is the next letter in the alphabet series
P,Q,R,S
The third letter of each term has a difference of 2 letters
G,G+2=I,I+2=K,K+2=M
The second letter of each term is the next letter in the alphabet series
L,M,N,O
Therefore, the next term is
GSMO
Answer is Option A