1.

If vec(p), vec(q) are two non collinear and non zero vectors such that (b-c) (vec(p) xx vec(q)) + (c-a) vec(p) + (a-b) vec(q)= vec(0) where a,b,c are the length of the sides of a triangle, then the triangle is

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Rt-angled
obtuse angled
equilateral
Isosceles

Answer :C


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