A proton of mass `m` and charge e is projected from a very large distance towards an `alpha` particle with velocity `v`. Intially, particle is at rest, but it is free to move. If gravity is neglected, then the minimum separation along the straight line of their motion will be

Options

A. `e^(2)//4 piepsilon_(0) mv^(2)`
B. `5e^(2)//4pi epsilon_(0) mv^(2)`
C. `2e^(2)//4 pi epsilon_(0) mv^(2)`
D. `4e(2)//4pi epsilon mv^(2)`

Answer

B