This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urethra & Penis, Subject name: Surgery
A 20-years old male presents with scrotal mass. The first investigation to be done is: 
Select and explain. 
A. Clinical evaluation (Palpation and transillumination), B. USG, C. Biopsy, D. AFP
A: Clinical evaluation (Palpation and transillumination)
Answer: A: Clinical evaluation (Palpation and transillumination) 
Explanation: Ans. (a) Clinical evaluation (palpation and transillumination)* Best Investigation is USG* The question asks the first investigation - Clinical examination may show nodules and loss of testicular sensation and secondary hydrocele.