How many such pairs of letters are there in the word

In the following question, find which one word cannot be made from the letters of the given word “CONTROVERSIAL”  

Which among the following words cannot be formed using the letters of the given word only once?

BIOTECHNOLOGY

Select the word, which cannot be formed using the letters of the given word. (Using the letters only once)

RESPONSIBILITY

How many meaningful words (more than 3 letters) can be formed using the letters of the given word  'DESIGNATION' ?

Which among the following words cannot be formed using the letters of the given word only once? COMPUTERIZED

Statements: H > E = Z ≤ L = R > S ≥ N = W

Conclusion

I: W < L

II: R ≥ E

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

TRANSPORT           

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

Which among the following words cannot be formed using the letters of the given word only once?

DEPARTMENT