Approximately what percentage of Earth’s freshwater is stored in glaciers and ice caps?

Correct option is D

According to USGS and IPCC:
· 68–69% of global freshwater is locked in glaciers & ice caps.
· Only ~1% is available as surface/groundwater.
Why other options are wrong
· (a) 2% is too low.
· (b) 10% not supported by hydrological data.
· (c) 50% still below actual value.