In the following question, sentences are given with a part in bold. The given phrase in the bold may or may not contain an error. The options following can replace the incorrect phrase. The correct phrase that is to be replaced will be your answer. If the sentences are correct then select ‘No improvement required’ as your answer.

India has been won its independence after a long, remarkably peaceful struggle for freedom.

The correct option is had won its independence.

Step-by-Step Explanation:

1. Analyze the original sentence:
The given sentence is: "India has been won its independence after a long, remarkably peaceful struggle for freedom."

2. Identify the grammatical error:
The phrase "has been won" is in the passive voice (present perfect passive). However, the subject "India" performed the action of winning independence, so the active voice must be used.
In addition, the sentence describes an event (winning independence in 1947) that was completed prior to another past context/struggle, or a finished historical event, making the past perfect tense ("had won") or simple past appropriate in grammar correction contexts. Among the choices, the past perfect active structure "had won" is used.

3. Evaluate the options:
- had win its independence: Incorrect because the past participle form "won" should follow "had", not the base form "win".
- has won its independent: Incorrect because "independent" is an adjective, whereas the noun "independence" is required as the object.
- has win its independence: Incorrect because "win" is not the past participle form.
- had won its independence: Correct active voice structure using auxiliary verb "had" + past participle "won" + noun "independence".

Therefore, replacing the bold phrase with had won its independence corrects the sentence structure.