Logical Sequence of Words Questions

In the following question, from the given alternative words, select the word which cannot be formed using the letters of the given word.
REASONABLE

A series is given, with one word missing. Choose the correct alternative from the given ones that will complete the series.
nephew, anther, tenses, prunes, preens, ?

Arrange the following words as per order in the dictionary. 1. Manifest 2. Meticulous 3. Meridian 4. Merchant

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

FGH, NOP, VWX, ?

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
Asia, Africa, North America, ?

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

Troposphere, Stratosphere, Mesosphere, ?

In the following question, from the given alternative words, select the word which cannot be formed using the letters of the given word.
RECIPROCATE

In the following question, from the given alternative words, select the word which cannot be formed using the letters of the given word.
Legislator