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
A Iaday 35 years old lactating mother Presented with a Painful breast lump. Most appropriate initial investigation should be: 
Select and explain. 
A. Mammography, B. USG, C. MRI, D. X-ray
B: USG
Answer: B: USG 
Explanation: Ans. b. USG(Ref Sutton's Radiology 7/e p1456; Schwaz 9/e p467; Sabiston 19/e p2035-p846) Indications of Breast Ultrasound: ,Itton's Radiology 7/e p1456)Symptomatic breast lump in women < 35 yearsBreast lump during lactation and pregnancyAssessment of mammographic abnormality (+- fuher mammographic views)Assessment of MRI or scintimammography detected lesionsClinical breast mass with negative mammogramBreast inflammationAugmented breast (together with MRI)