Which of the following units is NOT used for measuring length?

Q. Which of the following units is NOT used for measuring length?
Answer: slug
Notes: Astronomical Unit, Light year and Par sec are the units used to measure very large distances whereas slug is a unit to measure heavy masses. 1 slug = 14.57 kg

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📌 Question Number: 19 in Physics GK 02 - Units in the above course in App.