@ Dominique - Shuffling the sub-questions with radio buttons & check boxes would be sufficient for my use case.
There is absolutely no urgency around this. So, please see what can be done whenever you have time to spare.
The reasons for shuffling the questions is to force students to pay more attention to reading the questions. After a couple of practice runs with a passage, they seem to mechanically remember the order of the questions.
While the shuffling of the answer options does introduce a degree of complexity, shuffling the order of the questions also will get the students to pay a little more attention to what they are reading.
I really appreciate the time and effort in making all these fixes into the system. Thanks !