A pen of mass 'm' is lying on a piece of paper of mass M placed on a rough table. If the coefficient of
friction between the pen and paper, and, the paper and table are μ1 and μ2, respectively, then the minimum
horizontal force with which the paper has to be pulled for the pen to start slipping is given by-
(A) (m + M) (μ1 + μ2) g (B) (mμ1 + Mμ2)g
(C) {mμ1 + (m + M) μ2} g (D) m(μ1 + μ2) g