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Railways PYQCBT 1 2016

RRB NTPC · Question 60

The test for diagnosing HIV is A. Pap Smear B. ELISA C. DNA D. Mantoux

  1. D

  2. B

  3. A

  4. C

Show answer & explanation

Answer: (B) B

Explanation

ELISA (Enzyme-Linked Immunosorbent Assay) is the standard screening test for HIV; it detects antibodies to the virus in the blood (positive results are confirmed by a Western blot). A Pap smear screens for cervical cancer, and the Mantoux test is for tuberculosis.