Question

Select suitable preposition:

He congratulated his friend ______the latter's success.

• A. at
• B. upon
• C. on
• D. against
• E. with

Answer 1

The correct option is

B. 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 B 'on' is correct as it is used to express an involvement in a particular activity. The other options are wrong as at, upon, against and with indicate a specific location, a surface above something, opposition and inclusion respectively. These uses don't fit in the given question. The correct answer is B 'on'.