Correct option is A
Option (a) is the correct order of the given sentences.
Explanation of sequence:
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A gives an introductory sentence about the Taj Mahal’s background.
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C tells how it began, introducing Prince Khurram and Arjumand.
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B provides background on Arjumand's family.
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D completes the narrative with the marriage.
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Structure tip: Always identify:
· Introduction (A)
· Chronology/event (C)
· Background (B)
· Outcome/conclusion (D)