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: Anaesthesia
A 60 year old man who is a known case of coronary artery disease with drug eluting stent placed 1year ago, presents with lump in abdomen and is posted for laparoscopic diagnostic evaluation. He is also hypertensive patient. Which of the following medications should he discontinue prior to procedure 
Select and explain. 
A. Atenolol, B. Clopidogrel, C. Simvastatin, D. Aspirin
B: Clopidogrel
Answer: B: Clopidogrel 
Explanation: Clopidogrel has to be stopped 7 days prior to surgery.