So now when I click on Yes option label of Question 2 then Question 1 Option is changed to Yes.Looks like this is because of same section containing same radio element with same label for attribute and same radio input value.
This looks like the same issue referenced in the below Support Article. There was a hot fix provided in that case. I am not sure what version you are using but you could open an SR if this hot fix applies or see if there is a different one for your version.
Carissa is correct. There are various HFixes out there for their respective releases which can generate unique IDs to resolve this. Also these are regular pxRadiobuttons for questions you are creating right?
These are not PegaSurvey "questions"? If that is the case, just let the support engineer know when clarifying so the scope is correct.