Final answer:
An infant with features like macrosomia, macroglossia, and other mentioned symptoms is at increased risk of Beckwith-Wiedemann syndrome, which is associated with an increased risk of Wilms tumor and Hepatoblastoma.
Step-by-step explanation:
An infant with characteristics such as macrosomia, macroglossia, hernia or omphalocele, hemihyperplasia, and hypoglycemia is at increased risk of Beckwith-Wiedemann syndrome; and associated with this syndrome is an increased risk of certain cancers, specifically Wilms tumor and Hepatoblastoma. Therefore, the correct answer is 'a) Beckwith-Wiedemann syndrome; Wilms tumor' and 'b) Beckwith-Wiedemann syndrome; Hepatoblastoma', as both tumors are associated with Beckwith-Wiedemann syndrome. It should be noted that Edwards syndrome is associated with different symptoms and is not characterized by overgrowth, which is a hallmark of Beckwith-Wiedemann syndrome.