Question about 1099-R Distribution from a Pension

I received a 1099-R form for a monthly pension from that new jersey taxes are taken from each month.  I need to pick a source of this distribution.  I assumed that I should pick The general rule pension or 401-k benefits.  It was not a 401 distribution, but a 403b distribution from a non profit that is sent on a regular monthly basis. 

 

Thank you.