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
LEAST diagnostic test for breast tumours: March 2013 
Select and explain. 
A. Chest X-ray, B. Biopsy, C. USG, D. Mammography
A: Chest X-ray
Answer: A: Chest X-ray 
Explanation: Ans. A i.e. Chest X-ray