Choose the most appropriate preposition to fill in the blank.
She succeeded _______ dint of perseverance and hard work.

Correct option is C

The correct preposition is by.
· Explanation:
· The idiom is “by dint of,” which means “because of” or “due to the effort of.”
· So, the sentence should read: She succeeded by dint of perseverance and hard work.
· Grammatical rule used:
· Certain expressions use fixed prepositions (e.g., by dint of, in favor of, in spite of).
Explanation in Hindi: “By dint of” एक मुहावरा है जिसका अर्थ होता है—किसी प्रयास, मेहनत या कारण से।
Meanings of other options:
· (a) For – not appropriate in idioms like this.
· (b) From – incorrect contextually.
· (d) To – wrong preposition in this idiom.