Parsec' is the unit of :

Options

A. time
B. distance
C. frequency
D. angular acceleration

Answer

b

Explanation

Parsec (Parallactic second)
It is the distance at which an arc of length equal to one astronomical unit subtends an angle of one second.
`["Angle"=("Arc")/("Radius")]`
1 Parsec `=(1A.U)/(1sec)div3.1xx10^(16)m`
This is generally used to measure the distances between the stars.