Which of these is the best choice for unit of measurement?
A
Oranges
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B
Metre stick
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C
Hand's span
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D
King's feet
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Solution
The correct option is B Metre stick Footstep, hands span or oranges differ in size and hence, cannot be standardized. A metre stick has a fixed length (equal to 1 m) under normal circumstances and can be copied and distributed across for usage.