Select the most appropriate option that rectifies the error(s) in the following sentence.
One must do his/her duty proparly.

Correct option is C

The correct sentence is "One must do one's duty properly."
1. "One" is a singular indefinite pronoun and requires the possessive pronoun "one's" for agreement.
2. The word "properly" is incorrectly spelt as "proparly" in the original sentence.
Correct sentence: One must do one's duty properly.
Grammatical Rule Used: When using "one" as a subject, the corresponding possessive pronoun must be "one’s," not "his/her." Incorrect: One must do his/her duty. Correct: One must do one’s duty.
Explanation of the grammatical rule in Hindi: "One" का उपयोग एकवचन सर्वनाम के रूप में होता है और इसके साथ "one's" का उपयोग सही है। "Proparly" को "properly" से बदलना चाहिए।
Errors in other options:
· (a) One must do one’s duti proprly: Contains spelling errors in "duti" and "proprly."
· (b) One must do ones duty properly: Lacks the possessive apostrophe in "one’s."
· (d) One must do once duty proparly: Uses "once" incorrectly and has spelling errors in "proparly."