Concept:The hierarchy of courts in Nigeria is arranged from the lowest trial courts up to the Supreme Court.
Explanation:At the top of the Nigerian court system is the Supreme Court.
The Court of Appeal is next in the hierarchy, above the lower courts.
State High Courts and Sharia/Customary Courts of Appeal function at higher state levels.
Magistrate and District Courts are the lowest courts in Nigeria.
These courts handle minor criminal and civil cases at the grassroots level.
Therefore, the lowest court in Nigeria is the Magistrate or District Court.
Answer:A. Magistrate/District Court