I actually wanna know if the nclex has this kind of question. Its kinda easy

EKG and ECG are actually different spellings of the same diagnostic test that monitors your heart's electrical activity. EKG is the abbreviation from the German spelling of electrocardiogram (which is elektrokardiogramm in German). The EKG abbreviation came into use because of where the test was initially invented. Source: www.mainlinehealth.org/blog/ekg-vs-ecg