As I interpreted it, the sequence is the first letter of 4 months in chronological order,
January February March April
So therefore the next letter would be M for May.
M, standing for May, of course, dummy!
M
A
A
K
p
It is: Y
k comes next, and then l.
E
When you answer sequence questions, look for a repetition anywhere. We can see that the first letter and the last letter is an 'F' so the sequence must be FHEXFHEXF.... so your answer is F.
m,./ from the bottom row of a keyboard
m
e
v