The baby is sleeping on her bed

[hirashin]

Dear native English speakers,
I think (a) would sound normal, but how about (b)? Could it be used?
(a) The baby is sleeping in her bed.
(b) The baby is sleeping on her bed.

Hirashin

 

[diligentcircle]

Yeah, those are both the same. You hear them both just as often.

 

[hirashin]

Thanks, Julimaruchan.