Multiple choice The optimum condition for BOD measurement is 25 degree centigrade / light / 5d 25 degree centigrade / dark / 5d 30 degree centigrade / dark / 5d 30 degree centigrade / light / 5d Reveal answer Fill a bubble to check yourself B Correct answer Explanation The optimum condition for BOD measurement is 25 degree centigrade / dark / 5d.