In which of the following is the radius of the first orbit minimum a hydrogen atom a tritium atoma triply ionized beryllium doubly ionized helium

In which of the following is the radius of the first orbit minimum a

1.	In which of the following is the radius of the first orbit minimum a hydrogen atom a tritium atoma triply ionized beryllium doubly ionized helium
Answer» a hydrogen atom is CORRECT one...... MARK me as BRAINLIST..........