Q: Which of the following are not a unit of time ?
(a) Second
(b) Parsec
(c) Year
(d) Light year
Ans: (b) & (d)
Parsec and Light year are the units of distance
1 Parsec = 3.1 x 1016 m
1 light year = 9.46 x 1015 m
These are not unit of time . These are unit of distance .