Select the most appropriate option to fill in the blank.
She was credited ________ inventing the device. -

Correct option is B

The correct option to fill in the blank is (b) with.
Explanation: The standard collocation is “credit + someone + with + (doing) something.” (“credit someone with inventing…”) meaning to regard someone as responsible for/author of something (Hindi: किसी को किसी उपलब्धि का श्रेय देना).
Example: “Marie Curie is credited with pioneering research on radioactivity.”
Why other options are incorrect:
· for — Used in the pattern “give/receive credit for + noun/-ing” (e.g., “She received credit for inventing…”), but after ‘credited’ (verb) + person, the correct preposition is with, not for.
· by — Introduces an agent in passive voice (“invented by her”), not after “credited.”
· to — Incorrect preposition with the verb “credit” in this sense.