I-485 question, pls help

[nsch]

Hi everyone,
In the application form I-485 - part 3 - nonimmigrant visa number
what is that?
1. the number on my valid visa stamp - on a right upper corner - control number about 15 digits?
2. or a color 8 digit number on a right bottom corner
3. or my EAC-******* number?
I will very much appreciate your help!

 

[Jaggy]

8 digit no

 

[oxa1]

I think it's the 13-15 digit control number.