Question

Fill in the blank with a suitable preposition:

John and Mary are talking _______ the telephone.

• A. With
  
• B. To
• C. On
• D. None of the above
  

Answer 1

The correct option is C On

A preposition is a word which comes before a noun or a pronoun and establishes a relationship between the elements of a clause or words. Option C)on is correct as it indicates a medium. The other options are wrong as with, to, and none of the above indicate inclusion, a direction, and that the given sentence doesn't require a preposition respectively. These uses don't fit in the given question. The correct answer is C)on.