Mother congratulation to his son ___ success.

A. with
B. on
C. to
D. of


Correct Answer: B. on 

Detail About MCQs

When we congratulate someone, we typically use the preposition “on” to indicate the reason or achievement for which we are offering congratulations. Therefore, it is “congratulate someone on something,” and in this case, it is “congratulation to his son on success.”

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