Applying for B2 visa for mother(widow-gets pension on behalf my late father)

[badymuka]

I am doing my MS and will graduate on 14 may2011.
I am inviting my mother.
she is widowed and gets pension on behalf of my late father,also she look after our agriculture land.
I am confused about what to select as "Primary Occupation" in DS-160 form?
Plz suggest me what to selet out of following?
1.Business
2.Agriculture.
3.Homemaker
4.Other
.
Thanx in advance.

[immihelp]

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