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Option 4 : All I, II and III
- 1 Astronomical Unit = 1.5 × 1011 m. It is used to determine the distance between the earth and the sun.
- 1 Slug = 14.59 kg. It is a unit of mass in the FPS System.
- 1 Lunar Month = 27.3 solar days. It is the time between the two consecutive full moons.
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