g.
The next term is ' d ' .
d
d
I think it's M.B is the second letter, C is the third, D is the 4th. The difference between these letters is one. D-G is 3 and G-J is 3 so I'd assume that the next letter is the third after J which is M.2-3-4-7-10-13
g.
' d ' is.
The next term is ' D '.
D
E G F A G B A Every other letter is in alphabetical
The next term is ' d ' .
d
d
e
G comes next in the musical note sequence. After G, the sequence starts again at A.
B b b b b b b d g a b c c c c c b b b a a b a d b b b b b b b d g a b c c c c c b b b d d c a g
Nope. A b c d.