A series is given with one term missing. Choose the correct alternatives from the given ones that will complete the series. LKFV, RQLB, XWRH, DCXN, JIDT, _____

In each element, 1st letter is 6 th succeeding letter of the 1st letter of the previous element. The 2nd letter is 6 th succeeding letter of the 2nd letter of the previous element. The 3rd letter is 6 th succeeding letter of the 3rd letter of the previous element. The 4th letter is 6th succeeding letter of the 4th letter of the previous element. 1st letter of each element, L + 6 = R, R + 6 = X, X + 6 = D, D + 6 = J, J + 6 = P 2nd letter of each element, K + 6 = Q, Q + 6 = W, W + 6 = C, C + 6 = I, I + 6 = O 3rd letter of each element, F + 6 = L, L + 6 = R, R + 6 = X, X + 6 = D, D + 6 = J 4th letter of each element, V + 6 = B, B + 6 = H, H + 6 = N, N + 6 = T, T + 6 = Z