You can achieve this custom MRQ quiz in three simple steps.  

• Add the question by adding a text box. 

• Add as many checkboxes as you want to the slide. Remove the labels from all of them. 

• Add a button to perform the submit action. 

• Use conditions to check if the learner selects the correct or incorrect answer. 

• Create one variable for each checkbox you created. If you have four checkboxes, create four variables and assign a value true to all of them when they are selected. 

• Add one text box for showing correct and incorrect feedback below the options and add default text aligning your requirements.  

• Add states to the text element for correct and incorrect feedback. 

• Add interaction on the button by adding the condition if a particular combination of variables has the value true, display the correct feedback; otherwise, display incorrect feedback using set state action. 

That was easy in previous versions, which had a checkbox interaction where you could choos the number of checkboxes and each checkbox could be linked with a user variable. However in the new version you will need to add each checkbox individually. Setting up the interaction is not that easy neither, because there are no longer reusable shared actions. You need to create one interaction, copy/paste it for the next checkbox and then edit it. Lot more work and clicking, not an improvement at all.