Question

Fill in the blank with a suitable preposition.

The patient's health improved day _______ day.

• A. of
• B. with
• C. by
• D. for

Answer 1

The correct option is C by

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)by is correct as it indicates a process. The other options are wrong as of, with, and for indicate possession, inclusion, and a purpose respectively. These uses don't fit in the given question. The correct answer is C)by.