In a mixture of `H-He^(+)` gas (`He^(+)` is singly ionized `He` atom), `H` atoms and `He^(+)` ions are excited to their respective first excited states. Subsequently, `H` atoms transfer their total excitation energy to `He^(+)` ions (by collisions). Assume that the Bohr model of atom is exctly valid.
The ratio of the kinetic energy of the `n=2` electron for the `H` atom to that of `He^(+)` ion is:

Options

A. `(1)/( 4)`
B. `( 1)/( 2)`
C. 1
D. 2

Answer

A