Which part of the given sentences is erroneous? In case, these is no error, choose option (D)

Correct option is C

Option (c) contains an error.
Explanation:
The error lies in the tense usage in part (c). The sentence uses "until they quarrelled" in the past tense, which indicates that the action is completed. However, "They have been" is in the present perfect tense and is inconsistent with the past action. The correct phrase should be "They had been" to ensure the past perfect tense aligns with the sentence context.
Corrected Sentence: They had been very close friends until they quarrelled.
Grammatical Rule Used:
1. When two past actions are mentioned, the earlier action is expressed in the past perfect tense (had + past participle).
2. The later action is expressed in the simple past tense.
Explanation in Hindi:
जब दो क्रियाएं अतीत में होती हैं, तो पहले की क्रिया past perfect tense में और दूसरी क्रिया simple past tense में होती है। Example: He had left before I arrived.