Birth Certificate, Parent's marriage certificate

[summi]

Hi,
My husband is sponsoring my parent's visit in June. They have appointment in May.
We have a few problems with documents.
1. I don't have a birth certificate, but have a nativity certificate.
2. The name of my mother on my passport is slightly different(changed after her marriage) from her name on her passport(name before her marriage).
3. My parents dont have their marriage certificate.

My question is:
1. Can I show my 10th class pass certificate as proof of birth date and as a proof of being the daughter of my parents?( But it has only my father's name.)
What is other alternative if not this?
2.If I arrange to get my birth certificate now, should I enter the name of my mother as per her name on her passport? or as per her name on my passport?
2. What other documents can my parents show, since they don't have their marriage certificate? I mean what is the other alternative?
Please reply soon.
Thanks.

[immihelp]

Your mother's name should be written everywhere as it is in her passport.

They don't need their marriage certificate.

[summi]

Thanks for the reply.
Should I get my mother's name on my passport changed to that in her passport then?
If so, is it possible to get that done in usa?

[immihelp]

Not needed. Don't take unnecessary hassle.