Final answer:
a. Scrotal ultrasound. Scrotal ultrasound is a highly reliable procedure to diagnose testicular cancer. It uses sound waves to create images of the scrotum and testicles.
Step-by-step explanation:
The highly reliable procedure to diagnose testicular cancer is scrotal ultrasound. A scrotal ultrasound uses sound waves to create images of the scrotum and testicles. It can help detect abnormal lumps or masses that may indicate testicular cancer. This procedure is non-invasive, painless, and does not involve any radiation exposure.