I would use the info at the right centered in the label.
Why? The wrist tends to the right so, It will be easier for the user to click and it doesnt break the layout of the questions.
Radio buttons works best if they are vertically align because the eye can scan from top to bottom than going from left to right, going down and to the left and continuing scanning.
BUT, after testing it, if the user is prompt to check the info tooltip, use it at left, aligned to the radio buttons. You can see the mouse movement in each case.
You can read more about the Fitt's Law here: https://en.wikipedia.org/wiki/Fitts%27s_law.
if you use a grid for the label and the radio buttons, the user will learn the pattern and complete the form asap.
In my opinion, it depends about the frequency of tooltip use. If the user are going to use this information frequently, left, if not, right.