Best screening marker of prostate cancer is
**Core Concept**
The best screening marker for prostate cancer is a topic of interest in urology and oncology. **Prostate-Specific Antigen (PSA)** is a protein produced by the prostate gland, and its levels can be elevated in prostate cancer.
**Why the Correct Answer is Right**
The correct answer is related to the **Prostate-Specific Antigen (PSA)**, which is widely used as a screening test for prostate cancer due to its high sensitivity. Elevated **PSA** levels can indicate prostate cancer, although not all elevated levels are due to cancer.
**Why Each Wrong Option is Incorrect**
**Option A:** Not provided, so we cannot assess its correctness.
**Option B:** Not provided, so we cannot assess its correctness.
**Option C:** Not provided, so we cannot assess its correctness.
**Option D:** Not provided, so we cannot assess its correctness.
**Clinical Pearl / High-Yield Fact**
It's crucial to remember that while **PSA** is a valuable screening tool, it's not definitive, and further testing like biopsy is needed for diagnosis.
**Correct Answer:** D. Prostate Specific Antigen.