Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test General Knowledge Geography (World Geography) Geomorphology
The _________ is responsible for Earth's magnetic field.
1
Mantle
2
Crust
3
Outer core
4
More than one of the above
5
None of the above