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यदि `2hati + 3hati + hatk " तथा " ahati - bhatj + c hatk` सदिश तथा लम्बवत होंगे , यदि -A. ` a = 2 , b = 3 , c = 4 `B. ` a = 4 , b = 4 , c = 5 `C. `a = 4 , b = 4 , c = - 5 `D. इनमे से कोई नहीं

Answer» Correct Answer - B


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