What is a Qualified Retirement Plan?

I have a 1099-R From Allianz Life Insurance Company.  Original owner of the plan was my father.  I was paid out due to his death.  I have entered it on my taxes but now I am being asked  "Was This Distribution From a 403(b) Plan?"  I am not sure how to answer this.  Either way I answer it then asks how much was an RMD?  Still not sure ho to answer this.  Help please.