Correct Answer: Cannot be determined

Solution : The correct answer is (d) Cannot be determined.

According to the World Health Organization (WHO), in 2020, 92.4 % of the global population had access to improved drinking water sources. This means that they had access to water from a source that was protected from contamination, such as a piped water supply, a borehole, or a protected well.

However, not all improved drinking water sources are equally safe. Some sources, such as rainwater harvesting, may be contaminated with bacteria or other pollutants.

The WHO also defines "safe drinking water" as water that is free from harmful substances that could make people sick. This includes bacteria, viruses, parasites, and chemicals. The safety of drinking water can vary depending on the source of the water, the way it is treated, and the way it is stored and distributed.