The vectors 3 hat i-2 hat j+hat k, hat i...

The vectors `3 hat i-2 hat j+hat k, hat i-3 hat j+5 hat k` and `2 hat i+hat j-4 hat k` form the sides of a triangle. Then triangle is (A) an acute angled triangle (C) an equilateral triangle (B) an obtuse angled triangle (D) a right angled triangle

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