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Correct Option is An earthquake of magnitude 4.3 occurred at northwest of Bikaner, Rajasthan on Monday morning.

Solution:As we go through the analysis of the sentence, we find that the sentence of option (a) is correct
(b) Replace ‘was’ with ‘were’ as it is used for plural form of verb.
(c) Replace ‘have’ with ‘has’ as here the subject is ‘the arrival’.
(d) Replace ‘predict’ with ‘predicts’ as brain is singular noun so, singular form of verb will be used.

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