<h3><u>Answer;</u></h3>
The symbol "Δ" means Change
The acronym BUN means Blood Urea nitrogen
<h3><u>Explanation</u>;</h3>
- Blood urea nitrogen refers to the measure of the urea level in blood. Abbreviated as BUN.
- Diseases that compromise the function of the kidney frequently lead to increased BUN level. And are usually diagnosed by measuring the amount of Urea in blood, called Blood Urea Nitrogen test.
Acually the corect order is china ,india, then usa and finally brazil
