Already have B1 now going for H1

[kam0408]

I already have B1/B2 on my passport and now going for H1 stamping to embassy. My question is when I have both B1 and H1.

1) Are both of the visas valid?
2)Would I be asked at port of entry which visa I want to use for entry to US

Any response is much appreciated.

Regards
Kamy

[kam0408]

Hi,

Please reply to my question. It would be a great help.

Regards
Kamy