The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A 49 years old male with 35 pack years presented with painless mass in left scrotal sac and microscopic hematuria. On laboratory investigation, Alphafetoprotein and lactate dehydrogenase was negative. What is the most probable diagnosis?   (A) Epididymitis   (B) Seminoma   (C) Renal cell carcinoma   (D) Carcinoma lung
['(C) Renal cell carcinoma <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Epididymitis \n (B) Seminoma \n (C) Renal cell carcinoma \n (D) Carcinoma lung <> possible answers', '  A 49 years old male with 35 pack years presented with painless mass in left scrotal sac and microscopic hematuria. On laboratory investigation, Alphafetoprotein and lactate dehydrogenase was negative. What is the most probable diagnosis? <> context@']