GDB ka answer submit hone ke baad edit ho sakta hai?

Salam, mujhe pochna tha k GDB ka answer edit ho sakta hai after submission? Aur agar nhi ho sakta, to ye bta sakta koi k agar instructions mein jo font aur font size btaya jata hai wo answer submit krty waqt change hi na kya ho, to number milty hain ya nhi?