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Q.

Among the following the least unit for length is

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a

parsec

b

angstrom

c

fermi

d

nanometer

answer is C.

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Detailed Solution

1 parsec = approx 3.16 light years.

naan meter = 10^-9 m

fermi = 10^-12 m

angstrom = 10^-10 m

So, fermi is the smallest distance.

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Among the following the least unit for length is