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থিম নির্বাচন

আপনার পছন্দের থিম বেছে নিন।

Which of these sentence is incorrect?

A. If had known that you were coming, I would have met you in the airport.
B. If hadn’t  been wearing a seat belt, I would have been seriously injured.
C. Had you obeyed orders, this disaster would not have happened.
D. none of the above
সঠিক উত্তরঃ D. none of the above
Explanation: