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The dye is made of ________

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The dye is made of ________

(a) Iodine

(b) Phosphorus

(c) Fluorine

(d) Nitrogen

I had been asked this question during an online exam.

I'm obligated to ask this question of Angiography topic in chapter Diagnostic Investigation in Neurology and Cardiology of Clinical Science

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The correct choice is (a) Iodine

Easy explanation: Iodine is an element that is found in abundance in nature. It is a large atom and so it can be worked upon and modified to have the desired radio active properties. The atom decays with time and the element can be flushed out of the body without any problems. Since Iodine is required by the body, it is a better choice than Barium and Gadolinium, the other two materials dyes are made of.

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