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: Anatomy
Best diagnostic method for breast lump is 
Select and explain. 
A. USG, B. Mammogram, C. Biopsy, D. FNAC
C: Biopsy
Answer: C: Biopsy 
Explanation: First investigation for tissue sampling : FNAC Best and diagnostic investigation : Biopsy Ref: Sabiston 20th edition Pgno: 826-828