Verbal Reasoning - Mental Ability Questions

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

LM_L_NL_N_M_

Select the odd word/letters/number/number pair from the given alternatives.

In the question, a word is represented by only one set of numbers as given in any one of the alternatives. The sets of numbers given in the alternatives are represented by two classes of alphabets as in two matrices given below. The columns and rows of Matrix I are numbered from 0 to 4 and that of Matrix II are
numbered from 5 to 9. A letter from these matrices can be represented first by its row and next by its column, e.g., 'A' can be represented by 03, 55, etc., and 'P' can
be represented by 10, 99, etc.
Similarly you have to identify the set for the word 'VENU'

Select the missing number from the given responses?

From the given alternative words, select the word which cannot be formed using the letters of the given word:
ECCENTRICITY

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

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

DEF, ? , OPQ , VWX

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

BDG, KMP, TVY, ?