Disorders of imprinting prader willi angelman syndromes 2

A pediatrician notes a child with developmental delay, excessive laughter, and ataxia. The child's genetic testing reveals a mutation in the maternal chromosome. Which syndrome should be suspected, and what is the likely genetic mechanism?

1: Prader-Willi syndrome due to paternal chromosome deletion
2: Angelman syndrome due to maternal UBE3A gene mutation
3: Prader-Willi syndrome due to maternal UBE3A gene mutation
4: Angelman syndrome due to paternal chromosome deletion