Step 1: Understanding the Question:
• This is a one-word substitution question from medical terminology.
• We need to identify the exact term that matches the removal and testing of cells from a living body.
Step 2: Detailed Explanation:
• Let us analyze each option based on its standard medical definition:
• Biopsy (Option A) is a clinical procedure in which a doctor extracts a sample of cells or tissue from a living patient's diseased organ or lesion to examine it under a microscope for diagnostic purposes (e.g., checking for cancer cells). This perfectly matches the definition in the question.
• Autopsy (Option B) is a highly specialized surgical procedure performed on a dead body (post-mortem) to determine the cause, manner, and mechanism of death. It is not performed on living, diseased organs.
• Operation (Option C) is a broad term for any physical intervention or surgery on a patient, which may or may not involve cellular testing.
• Amputation (Option D) is the surgical removal of a limb or extremity (like an arm or leg) due to trauma, infection, or severe vascular disease. It does not mean diagnostic cellular testing.
• Therefore, Option (A) is the correct and precise answer.
Step 3: Final Answer:
The correct option is (A).