I need some answers to film trivia questions

Help, i have 4 film questions but i havent a clue what the answers are can anyon ehlp me please - heres the information:

OT 2021

12x12.-

A
B
C

111
U1235S

These are all films

OT 2021: Back to the Future

12x12.-: Grosse Pointe Blank

ABC: First Blood

111
U1235S: Once Upon a time in America

Thanks for your help X