Need an urgent suggestion for filling DS 160 FORM

[tushart]

I appreciate if one can provide the valuable suggestion in filling DS 160 form. I am planning to apply my father's visitor visa who is a doctor having his own clinic. so,needed a valuable suggestion what shall I select primary occupation in DS - 160 FORM : should it be Business or Medical / Health or Non Employed. ? Kindly provide the valuable suggestion and if possible with reason.

[immihelp]

Medical/health.