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: Surgery
What is the recommendation for bi rads 4? 
Select and explain. 
A. Regular follow up, B. Tissue diagnosis, C. Short interval follow up, D. Excision
B: Tissue diagnosis
Answer: B: Tissue diagnosis 
Explanation: Birads IV is suspicious for malignancy. It is recommended to take tissue for biopsy.