The distance of stars from earth is generally measured in:

1. Kilometre
2. Light year
3. Angstrom
4. Fermi

The unit of time is:

1. light year
2. parsec
3. leap year
4. angstrom

One metric tonne is equal to :

1. 10 quintal
2. 100 quintal
3. 1000 quintal
4. 25 quintal

One solar mass is equal to :

1. 3 x 10²⁰ kg
2. 2 x 10²⁷ kg
3. 2 x 10³⁰ kg
4. 3 x 10³⁰ kg