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 comet known as Halley's Comet has an average period of orbit of
1
46 years
2
76 years
3
66 years
4
More than one of the above
5
None of the above