If function f(x) satisfies f (1-x) = f (2+x) for all x,

If function f(x) satisfies f (1-x) = f (2+x) for all x, which of the following can be true?

f(x) = 3-x
f(x) = 1-x^2
f(x) = 2 - x - x^2
f(x) = 2x - (1-x)^2
f(x) = (1-x) / (2 + x)