Final answer:
The responsibility for a medical bill of an emancipated minor falls on the emancipated minor as they are considered to legally bear the responsibilities of an adult.
Step-by-step explanation:
The responsibility for a medical bill of an emancipated minor belongs to the emancipated minor themselves. When a minor is emancipated, they gain the legal rights and responsibilities of an adult before reaching adulthood. This includes the responsibility to pay for their own medical bills. The notion of emancipation means that the minor is no longer under the legal care and control of parents or a legal guardian. So, in this context, responsibilities such as handling medical expenses would typically not fall on the parents, legal guardian, or grandparents.