<prompt> In terms of the leads looking at the hea walls, which of the following is an odd one out?Lead IILead IIILead aVLLead aVF  <response>: Leads II, III, and aVF are called inferior leads. These leads have their positive or exploring electrode on the foot. These 3 leads look to the hea from below; i.e., they are directly looking at the inferior wall of the hea. Any ECG changes in these 3 leads will be reflective of pathology of the inferior wall e.g., inferior wall MI. avL looks at the hea from left side, hence it is the odd one out. 