<prompt> According to IUB system, hydrolases belong to which class ?EC-1EC-2EC-3EC-4  <response>: Ans. is c i.e., EC-3IUB classificationEnzyme code number EC numberEnzymeEC-1OxidoreductaseEC-2TransferaseEC-3HydrolasesEC-4LyasesEC-5IsomerasesEC-6Ligases 