Correct Answer: Biopsy

Solution : The correct option is Biopsy.

A biopsy is a medical technique that is widely used to diagnose cancer. A biopsy involves the removal of a tiny sample of tissue or cells from the suspected cancerous region or tumour, which is then inspected under a microscope by a pathologist to identify the presence of cancer cells. Biopsies can give vital information about the kind of cancer, its stage, and its features, which is required for an accurate diagnosis and the development of a suitable treatment strategy.