Execute an script in background

[Zanabria, Moises]

Guys,
This maybe is a silly question but I tried several ways to do it without success.

I have two scripts one script is running in the commitinfo,  lets say script A,  script A has embedded script B, I want to run script B in the background, so in other words I need finish script A and leave script B in the background, however script A always wait for script B results.

I tried the following syntax in script A

 scripts_A.sh &
`script_A.sh` &
nohup scripts_A.sh &

Is there any way to call this script and leave it in the background?

Thanks in advance.
Moises.