How to create multiple selected options of a option

I am trying to create a question in which there are two options but one option has multiple sub options. I have tried to search a lot but I have not found a way to achieve this using radio and checkbox button. Does anybody has any reference or can guide me that how can I achieve this?

Do you have a product ready to be marketed immediately in the US?
a. Ready for immediate export
b. I am missing some items (check all that apply)
- Packing
- Label
- FDA
- Price and conditions of sale
- Registered Trademark
- SKU
- Entry rules in the destination country
- Other