question_answer

Solve \[\frac{{{\mathbf{p}}^{\mathbf{2}}}{{\mathbf{(q-r)}}^{\mathbf{2}}}}{{{\mathbf{(p+r)}}^{\mathbf{2}}}\mathbf{-}{{\mathbf{q}}^{\mathbf{2}}}}\mathbf{+}\frac{{{\mathbf{q}}^{\mathbf{2}}}\mathbf{-(p-r}{{\mathbf{)}}^{\mathbf{2}}}}{{{\mathbf{(p}+\mathbf{q)}}^{\mathbf{2}}}\mathbf{-}{{\mathbf{r}}^{\mathbf{2}}}}\mathbf{+}\frac{{{\mathbf{r}}^{\mathbf{2}}}\mathbf{-(p-q}{{\mathbf{)}}^{\mathbf{2}}}}{{{\mathbf{(q+r)}}^{\mathbf{2}}}\mathbf{-}{{\mathbf{p}}^{\mathbf{2}}}}\]

A)  \[\frac{1}{p+q+r}\]                             

B)        p + q + r     

C) 0                                                                     

D) 1

E)  None of these