Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test General Knowledge Geography (World Geography) Origin and evolution of Universe Solar system
The age of the Earth is about
1
1.9 Billion years
2
4.6 Billion years
3
6.3 Billion years
4
More than one of the above
5
None of the above