Two small spheres of masses `M_(1)` and `M_(2)` are suspended by weightless insulating threads of lengths `L_(1)` and `L_(2)` The spheres carry charges `Q_(1)` and `Q_(2)` respectively. The spheres are suspended such that they are in level with one another and the threads are inclined to the vertical at angles of `theta_(1)` and `theta_(2)` as shown. Which one of the following conditions is essential, if `theta_(1)=theta_(2)` ?

Options

A. `M_1=M_2`
B. `M_1 ne M_2`, But `Q_1 = Q_2`
C. `L_1 = L_2`
D. `Q_1 = Q_2`

Answer

A