<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 39-year-old man presents with painless swelling of the right testes and a sensation of heaviness. The physical examination revealed an intra-testicular solid mass that could not be felt separately from the testis. After a thorough evaluation, he was diagnosed with testicular seminoma. Which of the following group of lymph nodes are most likely involved?? A: Para-aortic lymph nodes, B: Superficial inguinal lymph nodes medial group, C: Deep inguinal lymph nodes, D: Superficial inguinal lymph nodes lateral group, E: Para-rectal lymph nodes,  <response>: This is a question about testicular cancer metastasis. Testicular seminomas typically metastasize in a stepwise fashion, first to the retroperitoneal lymph nodes para-aortic lymph nodes, then to the mediastinal lymph nodes, and later to supraclavicular lymph nodes. So out of the choices given, para-aortic lymph nodes are most likely to be involved in a patient with testicular seminoma.A: Para-aortic lymph nodes 