This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Breast, Subject name: Surgery
25 year old female presenting with lump in breast to OPD-First investigation is 
Select and explain. 
A. USG, B. Mammogram, C. MRI, D. PET
A: USG
Answer: A: USG 
Explanation: Ans. (a) USG(Ref Bailey and Love 27h edition Page 861)* USG is IOC in young females with Dense breast to evaluate a lump in Breast* It is not useful as a screening tool as it is operator dependent.