If f(x)=a x^2+b x+c such that f(p)+f(q)=...

If `f(x)=a x^2+b x+c` such that `f(p)+f(q)=0` where `a!=0; a ,b ,c ,p ,q in R` then number of real roots of equation `f(x)=0` in interval `[p ,q]` is (a)Exactly one (b) at least one (c)at most one (d) data provided is insufficient

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