It’s 10 to 12 (Official clock system).

11:50

It’s 10 to 12.

Correct answer

12:10

It’s 10 past 12.

Error: mirror minute hand about the vertical axis

10:49

It’s 11 to 11.

Error: confuse hour and minute hands and read as hours with ‘past’ or ‘to’

10:55

It’s 5 to 11.

Error: confuse hour and minute hands