Select the most appropriate option to fill in the blank.
The project must be completed _____ the end of the week.

Correct option is D

✔️ Correct option: (d) by
Sentence: “The project must be completed _____ the end of the week.”
Explanation: The preposition “by” is used to refer to a deadline – the latest time by which something should be done. “By the end of the week” means any time before or on the last day of the week.
· Hindi meaning: सप्ताह के अंत तक
Grammatical rule used: Use “by” when referring to a time before or at a deadline.
✦ In Hindi: जब किसी कार्य को किसी समय सीमा तक पूरा करना हो, तो “by” का प्रयोग किया जाता है।
Meanings of other options:
· (a) on – used for specific dates/days (e.g., on Monday). ❌
· (b) in – used for durations, not deadlines (e.g., in a week). ❌
· (c) at – used for specific points in time (e.g., at 5 PM). ❌