The correct answer could be ice chips.
Acute post-streptococcal glomerulonephritis is a disorder affecting the kidneys and it is mainly caused by bacterial infections, such as a streptococcus skin infection. Since it is a case of kidney dysfunction, a common practice is to restrict fluid intake in patients. Ice chips are a good choice since they moisten the mouth and relieve the feeling of thirst, but at the same time, they do not result in an excessive increase of fluid intake.