H4 interview needs original I-129 or I797B?

USA H1B Visa
1

Hi,

I will be travelling to US on June 25th 2016, I need to carry my original I-129 and I797B with me for POE.
I booked Interview slot for my spouse H4 Interview on July 6th.
So she cannot carry these original documents.
Would it cause any problem, are the originals of these documents mandatory for H4 Interview?

2

In interview only I 797 will be aked - not I 129. Also copy of yr visa

3

Original or copy of I797 will do?

4

Yes. additionally copy of yr stamped visa.