question_answer

If \[{{\mathbf{a}}^{\mathbf{th}}},\text{ }{{\mathbf{b}}^{\mathbf{th}}}\mathbf{and}\text{ }{{\mathbf{c}}^{\mathbf{th}}}\]terms of an H.P. are p, q and r respectively, the value of \[\mathbf{qr}\,\,\left( \mathbf{b}-\mathbf{c} \right)+\mathbf{pr}\,\,\left( \mathbf{c}-\mathbf{a} \right)+\mathbf{pq}\text{ }\left( \mathbf{a}-\mathbf{b} \right)\]

A) -1                                                                    

B) 1            

C)  0           

D) 2q

E) None of these