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থিম নির্বাচন

আপনার পছন্দের থিম বেছে নিন।

'I know his birthday . - thy complex sentence of this is __

A. I know about his birth and its day .
B. His birthday is know to me .
C. I know when he was born .
D. This is his birthday and I know it .
সঠিক উত্তরঃ C. I know when he was born .
Explanation: