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[" Two vector "bar(A)=2hat i+3hat j-4hat k" and "vec B=4hat i+8hat j+xhat k" are such that the component of "vec B" along "vec A" is zero."],[" Then the value of "x" will be: "],[[" (A) "8," (B) "-4," (C) "+4," (D) "-8]]

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