How to Merge Two Select_Single Questions into One Unified Set of Options in KoboToolbox?

I have two separate select_single questions and intend to merge them into a single set of options. To achieve this, I will hide the label of the second question and ensure that both questions behave as a unified selection set. How can I effectively configure this within the system?

@sudeep, do you intend to make a select one question for the informed consent?


Yellow highted are the questions and choices
And I wanna make category_1 and category_1.1 response like single choice options.