Barium in a suitable form is administered to patients before an X ray examination of the stomach bec...........

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Barium in a suitable form is administered to patients before an X-ray examination of the stomach, because

barium allows X-rays to pass through the stomach on account of its transparency to X-rays

barium is a good absorber of y-rays and this helps the stomach to appear clearly in contrast with the other regions in the picture

barium is a good absorber of X-rays and this helps the stomach to appear clearly in contrast with the other regions in the picture

barium salts are white in colour and this helps the stomach to appear clearly in contrast with other regions in the picture

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Explanation:

3rd option is correct.
Barium in a suitable form is administered to patients before an X-ray examination of the stomach, because it is a good absorber of X-rays and this helps the stomach to appear clearly in contrast with the other regions in the picture.