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Question
The length of your footstep can be used as a standard unit of length.
Options:
A .  True
B .  False
C .  Kelvin
D .  Cubic metre
Answer: Option B
:
B
The unit of length should be chosen such that it is constant and same for everyone. SInce, everyone's footstep is not same, it cannot be used as a unit of length.

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