This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Medicine
A patient with DM of 4 yrs duration presents with dizziness and HR 52/min, probable cause is 
Select and explain. 
A. Hypoglycaemia, B. Inferior wall MI, C. Sick-sinus syndrome, D. Autonomic dysfunction
B: Inferior wall MI
Answer: B: Inferior wall MI 
Explanation: An inferior wall myocardial infarction -- also known as IWMI, or inferior MI, or inferior ST segment elevation MI, or inferior STEMI -- occurs when inferior myocardial tissue supplied by the right coronary aery, or RCA, is injured due to thrombosis of that vessel . Ref Davidson 23rd edition pg 460