A

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Q. The metal barium is used in

  • (A) taking X-rays of the alimentary canal
  • (B) taking X-rays of the brain
  • (C) checking blood groups
  • (D) none of these
  • Correct Answer - Option(A)
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  • Filed under category Biology
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Explanation by: Admin

Barium sulfate (BaSO₄) is used in medical imaging as a contrast agent for X-ray imaging of the alimentary canal (digestive tract). It is an insoluble, non-toxic compound that helps to highlight the esophagus, stomach, and intestines in barium swallow and barium meal procedures.

  • (B) Taking X-rays of the brain → Not applicable; brain imaging is done using CT scans or MRIs.
  • (C) Checking blood groups → Blood typing uses antigens and antibodies, not barium.
  • (D) None of these → Incorrect, as barium is used in X-ray imaging of the digestive system.

Thus, the correct answer is (A) Taking X-rays of the alimentary canal.

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