If f(a + b – x) = f(x), then is equal to

Given, f (a + b - x) =f(x)

a + b – x = x

a + b = 2x

x =

Now,

Option A: - it’s not option A , this is clearly justified on solving.

Option B: - it’s not option B , this is clearly justified on solving.

Option C: - it’s not option C , this is clearly justified on solving