Retirement tax questions

I ran this through all the way through the tax checker section... it wants me to make a selection from the Question and answers below.  I want to select "None of the above"... but it stays in red and won't accept that answer.  Why?

 

"Select the source of this distribution and enter any other Maryland information. Learn more

- Pickup contribution
- Active or reserve military retirement
- Self employed retirement income from a plan you established and contributed to before 1967
- None of the above
 
Needs info."