Wlecome @chandi on the opendatakit forum. When you get a chance Pmplease take some time Introduce yourself here
What you want to achieve needs you to set the relevant condition for each question or group of question in the survey sheet. For exemple for question A to D :
${grade} <= 10
If you group your questions you can set it for the group only.
https://docs.getodk.org/form-logic/#conditionally-showing-questions