< = less than
> = greater than
57 is less than(<) x minus(-) 19
57 < x - 19
Your answer is the 4th option because:
The 1st option is not the answer because 19 is subtracted by x when it should be x minus 19, and the sign is > when it should be <
The 2nd option is not the answer because it should be x minus 19
The 3rd option is not the answer because the sign is > when it should be <