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 `theta_(1)` and `theta_(2)`respectively . Which one of the following conditions is essential for `theta_(1) = theta_(2)` ?

Options

A. `M_(1) != M_(2)` but `Q_(1) = Q_(2)`
B. `M_(1) = M_(2)`
C. `Q_(1) = Q_(2)`
D. `L_(1) = L_(2)`

Answer

B