Drinking water is the water that is safe and suitable for human consumption. There are various sources of water, but not all of them are suitable for drinking. Let's look at the options given in the question and find out which ones are suitable for drinking.
River water: River water is not safe for drinking directly. It may contain pollutants, bacteria, viruses, and other harmful substances that can cause waterborne diseases.
Pond water: Pond water is not safe for drinking directly. It may contain algae, bacteria, viruses, and other harmful substances that can cause waterborne diseases.
Ocean water: Ocean water is not suitable for drinking directly. It contains a high amount of salt, which can cause dehydration, and it may also contain pollutants, bacteria, viruses, and other harmful substances that can cause waterborne diseases.
Conclusion:
From the above analysis, we can conclude that none of the options given in the question are suitable for drinking except for option 'd' which is 'None of these'. It is important to note that before drinking water, it should be treated and purified to remove harmful substances and ensure its safety for human consumption.
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