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.
ENCYCLOPEDIA

From the given alternatives, select the word which CANNOT be formed using the letters of the given word.

Compatible

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

Hydrogen, Helium, Lithium, ?

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

?, flight lieutenant, squadron leader, wing commander

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

Glacier, Waterfall, River, ?

From the given alternatives, select the word which CANNOT be formed using the letters of the given word.

Ancillary

From the given alternatives, select the word which CANNOT be formed using the letters of the given word.

Premonition

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

CONCENTRATION