Removing radio buttons only from carried over MC options, and randomizing two new answer options

I have 4 images randomly presented for 15 seconds in the previous question with all radio buttons removed. In the next question, the 4 images are carried over in the same random order, but two additional answer options are added below. How do I remove radio buttons from just the 4 images, and randomize the two additional answer options? I found
https://www.qualtrics.com/community/discussion/comment/5371#Comment_5371
with the solution of using:
:eq(6) instead of jQuery('input[type=radio]:nth-child(7)').hide();
but was unsuccessful with that -- I have no idea how to modify that jQuery code correctly. Can anyone help? Thanks!!