National Environmental Balancing Bureau (NEBB) Certified Professional (CP) Practice Exam

SI stands for the International System of Units in English. The acronym actually comes from the French name Système International d'Unités, which is the official designation and the source of the acronym. In practice, the English rendering is the one you’ll see in technical references, NEBB materials, and international standards, so it’s the form that matches what the question is asking. This system provides standardized base and derived units (and prefixes) so measurements are consistent worldwide. The other options aren’t the standard English naming for the system, and while the French name is the original, it isn’t the form typically used in English-language contexts.