The correct options are
A continous at x=1
B differentiable at x=2
C continous at x=2
f(x)=∫x0|x−1|dx
Using leibnitz theorem
f′(x)=1.|x−1|−0=|x−1|
Therefore for x=1 f′(x) is continuous, but not differentiable as moduls function is not differentiable at its critical point.
And for x=2, f′(x) is continuous and differentiable