what happens if in any multiple choice paper1 there was shadow of answers that were not erased well

[harry1]

guys i have done the multiple choice paper 1 and i have shifted some answers but then corrected them and then corrected them but i didnt erase the wrong ones very good and there was a thin shadow so
i am worried that i will lose the mark
plz answer if u can tell wat will happen

 

[abdullah1996]

which subject

 

[Jelleh Belleh]

I think they make it so that the OCR scanner accepts the darkest-coloured block?

 

[umair1161]

It's an OMR sheet......