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 is 
Select and explain. 
A. >2cm, B. >3cm, C. >4cm, D. >5cm
C: >4cm
Answer: C: >4cm 
Explanation: 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 imaging (MRI) and hormonal evaluationRef: Bailey and Love 27e pg: 840