Hi @Kiran
I have a sample form that should help you solve your problem: choice-name.xlsx (9.2 KB)
It contains everything you need but if there is something you don't understand please ask.
To my knowledge, pre-filling an answer like that is not possible. You can certainly add strings to the label or hint that say a message like Based on previous questions, this should be "yes". You can also include a constraint that says it must be "yes" based on previous questions. You could also consider skipping the question (relevant column) and in the data cleaning phase to add a "yes" to that column.
Thank you for ur time. "Helpline-1912" is just an example. Any options selected in Q503_1 should not be reflected or selected by interviewer in the following questions of Q503_2 and Q503_3. Please help me write a dynamic logic.
I agree with @yanokwa that this seems impossible. I see it differently though; There just no need to ask for the the brand "Q10. Are you aware of brand Nokia?" if one already responded to "Q1. What are the mobile brands you are aware of?" with 1. Nokia. Instead Q10 is skipped as irrelevant using a relevance condition eg. "not(selected(${q1},'1'))". In your data management software, then (eg stata), include a line in the do file to replace q10= 1 if q10==. [ie replace q10 as Yes if missing]. If you are managing the data in excel, filter out the blanks in q10 and select all these blank cells; type 1 and press control enter or do a similar thing for your other favorite data management software