Multiple choice general knowledge

What is the unit for Length?

  1. Metre (m)

  2. Kelvin (K)

  3. Volt

  4. Second (s)
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A Correct answer
Explanation

The metre (m) is the SI base unit for length. Since 1983, it has been defined as the length of the path traveled by light in vacuum during a time interval of 1/299,792,458 of a second. This definition provides an exact, unchanging standard.

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