Which of the following tumor markers is useful for monitoring germ cell tumors or placental tumors?

Question

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hCG (human chorionic gonadotropin) is a hormone that is produced by germ cells and placental tissue. Its levels can be monitored to track the progression of tumors derived from these tissues, such as germ cell tumors or placental tumors. CEA (carcinoembryonic antigen) is more commonly associated with colorectal and other gastrointestinal cancers. PSA (prostate-specific antigen) is primarily used in the detection and management of prostate cancer. CA-19 (carbohydrate antigen 19) is typically elevated in pancreatic, gallbladder, and bile duct cancers.

Which of the Following Tumor Markers Is Useful for Monitoring