This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
A patient had an inferior wall myocardial infarction and was in shock. The reason for the patient being in shock is - 
Select and explain. 
A. Mitral regurgitation, B. Infarction causing septal defect, C. Right ventricular infarction, D. Decreased ejection fraction from left ventricle
C: Right ventricular infarction
Answer: C: Right ventricular infarction 
Explanation: None