Which letter-cluster will replace the question mark (?) to complete the given series?

DUYG, ?, PGKS, VMQY, BSWE​​

Given: DUYG, ?, PGKS, VMQY, BSWE​​

Logic: Each letter + 6

1st letters:
D + 6 = J
J + 6 = P
P + 6 = V
V + 6 = B

2nd letters:
U +  6 = A
O + 6 = U
U + 6 = G
G + 6 = M
M + 6 = S

Y + 6 = E 
E + 6 = K
K + 6 = Q
Q + 6 = W

4th letters:
G + 6 = M
M + 6 = S
S + 6 = Y
Y + 6 = E

So the missing term is JAEM.

Thus, correct option is (c).