Which of the following tests helps in diagnosis of cancer? (1) Urine test (2) Blood test (3) Biopsy (4) X-Ray

Which of the following tests helps in diagnosis of cancer? (1) Urine test (2) Blood test (3) Biopsy (4) X-Ray
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(3) Biopsy Explanation: A biopsy is a medical test commonly performed by a surgeon or an interventional radiologist involving sampling of cells or tissues for examination. It is the medical removal of tissue from a living subject to determine the presence or extent of a disease. When cancer is suspected, a variety of biopsy techniques can be applied. An excisional biopsy is an attempt to remove an entire lesion. When the specimen is evaluated, in addition to diagnosis, the amount of uninvolved tissue around the lesion, the surgical margin of the specimen is examined to see if the disease has spread beyond the area biopsied.
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