Is my B1 visa still valid (2017) if i entered US on L1B visa and now i have LtoH converted (I797)?

Hello, Initially I came to US on L1B visa and later got conversion to H1B (I797). Also I have B1Visa in my passport, is this B1 Visa still valid.
I need to know this because I am travelling through France to India and if travel through Paris my agent mentioned that I should have a valid US visa even though I am not getting out of the airport. So please help me, I tried contacting French embassy but no response yet from them

Unless the visa has been canceled in the passport, it is still valid.