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থিম নির্বাচন

আপনার পছন্দের থিম বেছে নিন।

What would be the correct form of conditionals in the blank space to complete the sentence, "If I had known he was in trouble I ______ helped."

A. would
B. would have
C. should have
D. should 
E. have had
সঠিক উত্তরঃ B. would have
Explanation:

would have