Which test is commonly used to detect cancer?

• A. CT scan
• B. Complete blood count
• C. Biopsy of tumor
• D. Chest X-ray

Answer: (C)

The best test for confirming cancer is taking a tissue sample from the suspicious area and examining it under a microscope. This biopsy provides a definite diagnosis by showing whether cancer cells are present and how the tissue is organized. Imaging tests like CT scans or chest X-rays can reveal a mass and help guide where to biopsy or how advanced a disease might be, but they cannot prove cancer on their own because a lump could be benign or due to other conditions. A complete blood count may hint at problems or blood-related cancers, but it does not confirm a solid tumor. So the biopsy is the most definitive way to determine if cancer is present.