A projectile is fired from the surface of earth of radius `R` with a velocity `k upsilon_(e)` (where `upsilon_(e)` is the escape velocity from surface of earth and `k lt 1)`. Neglecting air resistance, the maximum height of rise from centre of earth is
A. `(R)/(k^(2))`
B. `(2R)/(1-k^(2))`
C. `(2R)/(k^(2))`
D. `(R)/(1-k^(2))`
