<prompt> In ECG lead II, III, and aVF are abnormal. Which of the following vessel is blocked?Left coronary aeryLeft anterior descendingRight coronary aeryRight circumflex aery  <response>: Leads II, III, and aVF detect Inferior wall ischemia. Inferior wall of hea is formed mainly by the major pa of right ventricle and left ventricles separated by the posterior interventricular groove, which is mainly supplied by the right coronary aery. Any block in RCA results in inferior wall and posterior 13rd of interventricular septum MI. 