In ancient India, small length measurements used were an 'angul' (finger) or a mutthi (fist). People also used the length of human feet for measurements. Why did we stop using these methods?
A
Indian 'angul' or 'foot' was not considered trustworthy.
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B
United Nations put a ban on these methods after Second World War.
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C
It was difficult to measure these units.
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D
Size of the body parts vary from human to human.
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Solution
The correct option is D Size of the body parts vary from human to human. Everyone's body parts could be of slightly different sizes. This caused confusion in measurements. A good unit of measurement is defined equally for everyone around the world. For example, 1 kg of rice in India should weigh 1 kg in Europe as well.