This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology and breast, Subject name: Surgery
Indication for surgery in a case of adrenal incidentaloma 
Select and explain. 
A. Size>5 cm, B. Bilateral adrenal metastasis, C. Functional tumor, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Ref: Bailey&;s 26thE pg: 780. Treatment of Incidentaloma: Any non-functioning adrenal tumour greater than 4 cm in diameter and smaller tumours that increase in size over time should undergo surgical resection. Non-functioning tumours smaller than 4 cm should be followed-up after 6, 12 and 24 months by MRI and hormonal evaluation.