Which court has exclusive original jurisdiction over class "A" and "B" misdemeanors?

The correct choice indicates that the Constitutional County Courts have exclusive original jurisdiction over class "A" and "B" misdemeanors. This jurisdiction is significant because it establishes which court has the authority to hear these particular types of cases initially, ensuring they are handled appropriately and in accordance with the law.

In Texas, "A" and "B" misdemeanors encompass a range of offenses that can lead to substantial legal consequences, including fines and possible jail time. The structure of the judicial system assigns specific jurisdictions to various courts based on the severity of offenses, and Constitutional County Courts are specifically designated to manage these class of misdemeanors to ensure that cases are heard by a court equipped to handle the nuances and complexities they may present.

This distinction plays a critical role in the legal process, as it ensures that misdemeanor cases are litigated within the proper venue, which is equipped with the necessary resources and expertise. Other courts, such as Justice of the Peace Courts, County Courts, and Municipal Courts, have their own jurisdictions that cover different types of offenses or civil matters, but they do not hold the exclusive original jurisdiction over class "A" and "B" misdemeanors as specified.