What will be the next term in : BDF, CFI, DHL, ?

C. EJO

In following alphabet series , one term missing as shown by question mark . Choose missing term from options. - OTE, PUF, QVG, RWH, ?

D. SXI

In alphabet series, some alphabets are missing which are given in that order as one of the alternatives below it. Choose the correct alternative. - _ cb _ ca _ bacb _ ca _ bac _ d

C. ADDDDB

In following alphabet series , one term missing as shown by question mark . Choose missing term from options. - cx, fu, ir, ?, ol, ri

A. LO

In following questions, one term in number series is incorrect. - Find out the incorrect number 8, 27, 125, 343, 1331

D. NONE OF THESE