The Schrodinger wave equation for hydrogen atom is `Psi_(2s) = (1)/(4sqrt(2pi)) ((1)/(a_(0)))^(3//2) (2 - (r)/(a_(0))) e^(-r//a_(0))` , where `a_(0)` is Bohr's radius . If the radial node in 2s be at `r_(0)` , then `r_(0)` would be equal to :

Options

A. `(a_(0))/(2)`
B. `2a_(0)`
C. `sqrt(2)a_(0)`
D. `(a_(0))/(sqrt(2))`