Step 1: Acetophenone oxime, C6H5C(CH3)=NOH, with acid catalyst undergoes Beckmann rearrangement.
Step 2: Phenyl group anti to OH migrates to nitrogen.
Step 3: Product after hydrolysis is C6H5NHCOCH3, acetanilide.
\[\boxed{\text{Beckmann rearrangement}}\]