Correct Answer - Option 1 : Handspan
Measurement is the comparison of an unknown quantity with a known quantity.
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Standard Unit of Length: When a unit is accepted by the majority of people, it is called a standard unit of measurement. Examples, kilogram, metre, etc.
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Non-Standard Unit of Measurement: Those units which are not accepted by the majority of people are called non-standard units of measurement. For example,
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Fathom: It is used for specification in marine depth, usually, 1 fathom (ftm) = 6 feet = 1.8288 metres
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Handspan: When your fingers are stretched out, the length between your little finger and thumb is called a handspan.
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Cubit: The length from your elbow to your middle finger is used for measurement.
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Finger: Smaller objects can be measured using finger
Hence, we conclude When your fingers are stretched out, the length between your little finger and thumb is known as handspan.
