If the digits 5 and 8, signs + and ? are interchanged on the left hand side in each option, then which of the following becomes correct A.5+8?2=22 B.8+5?2=18 C.5?8+2=42 D. 8?2+5=21

don't know
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sorry 
 
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According to me it would be option  C
 
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