Verbal Reasoning - Mental Ability Questions

From the given alternatives, according to dictionary, which word will come at SECOND position?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.

? , Lal Bahadur Shastri, Indira Gandhi, Morarji Desai, Choudhary Charan Singh

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.

RST, XYZ, DEF, ?

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?

_d_be_c_ed_b

In the following question, select the odd word pair from the given alternatives.

Nurse : Ward :: Teacher : ?

In the following question, select the odd word from the given alternatives.

Select the missing numbers from the given responses.