Arrange the words given below in a meaningful sequence:

1. Milky-way

2. Sun

3. Moon

4. Earth

5. Stars

1. Milky-way, 2. Sun, 3. Moon, 4. Earth, 5. Stars

Logic: Arranged based on the smallest to the largest hierarchy of celestial bodies:

Milky Way is the largest as it is a galaxy.
Stars are found within the Milky Way, including the Sun.
The Sun is a star and the center of the Solar System.
The Earth orbits the Sun.
The Moon orbits the Earth.

The correct order is: 3 (Moon) → 4 (Earth) → 2 (Sun) → 5 (Stars) →1 (Milky-way).

Thus, the correct answer is (a).