The radius of which of the following orbit is same as that of the first Bohr's orbit of hydrogen atom?
AHe+ (n=2)
BLi2+ (n=2)
CLi2+ (n=3)
DBe3+ (n=2)
where n=orbit ...?
AHe+ (n=2)
BLi2+ (n=2)
CLi2+ (n=3)
DBe3+ (n=2)