Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test Environmental Studies World Geography Solar System
How will you differentiate between a star and an artificial satellite in the night sky?
1
By its twinkle
2
By its speed
3
By its shape
4
More than one of the above
5
None of the above