If Every Pair from among the equations  x2 + px+ qr =0  , x2 + qx + rp = 0  and x2 + rx + pq = 0 has a common root, then the sum of the three common roots is????


a)  2(p+q+r)

b)  p+q+r

c)  -(p+q+r)

d)  pqr

Dear Student!

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