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: Unknown
A Patient is on regular medications for co-existing medical problems. Which of the following drugs may be stopped safely with minimal risk of adverse effects before an abdominal surgery - 
Select and explain. 
A. Statins, B. Bta Blockers, C. ACE inhibitors/ACE Receptor Blockers, D. Steroids
C: ACE inhibitors/ACE Receptor Blockers
Answer: C: ACE inhibitors/ACE Receptor Blockers 
Explanation: Ans-C