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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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Radio isotopes are used in the following techniques except:
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The correct answer is  C i.e. ELISA Concept: ELISA (Enzyme Linked Inununoabsorbent Assay) is an enzyme based immnoassy; the similar test which uses radioactive isotope in place of enzyme is known as Radioimmunoassay (RIA) So I don't think any need of learning that- Nucleic acid sequencing, mass spectroscopy & RIA are tests using radio isotopes.