Answer: b. nitrites
Explanation:
Cystitis can be defined as the inflammation that occurs in the bladder. The bladder gets red, swollen and irritated. The cause of cystitis is urinary tract infection caused by the bacteria. The bacteria may enter inside the bladder through urethra.
The infected urine may consists of considerable amount of nitrites as a result of bacterial enzyme nitrate reductase which break down nitrates into nitrites. The urinalysis for the detection of nitrites is a test for cystitis.
