Verbal Reasoning - Mental Ability Questions

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

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

LMA, NOB, PQC, ? , STE

 In a certain code language, “POLIS” is written as “SROLV”. How is “MRUGS” written in that code language?

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

MAN, ODR, QGV, SJZ, ?

Choose the related word/letters/number from the given alternatives. CD : 916 : : ? : 100144

Select the missing number from the given responses?

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
2, 10, 30, 68, ?

A series is given,with one term missing. Choose amongst the given responses choose the meaningful one

206, 221, 251, 296, ?, 431