Correct option is C
Given: LSF2, JPJ9, HMN18, FJR29, ?

Logic: 1st letter - 2, 2nd letter - 3, 3rd letter + 4 and number is increasing + 7, + 9, + 11 and + 13 place.
For, 1st letter
L - 2 = J, J - 2 = H, H - 2 = F, F - 2 = D
For, 2nd letter
S - 3 = P, P - 3 = M, M - 3 = J, J - 3 = G
For, 3rd letter
F + 4 = J, J + 4 = N, N + 4 = R, R + 4 = V
For, number
2 + 7 = 9, 9 + 9 = 18, 18 + 11 = 29, 29 + 13 = 42
So, the missing term is DGV42.
Thus, correct option is (c).