Surface plates of earth are made ofA. Crust and solid part of upper mantleB. Outer heterogeneous part of crustC. Both outer heterogeneous and lower homogeneous crust.D. Lower homogeneous part of crust

Surface plates of earth are made ofA. Crust and solid part of upper ma

1.	Surface plates of earth are made ofA. Crust and solid part of upper mantleB. Outer heterogeneous part of crustC. Both outer heterogeneous and lower homogeneous crust.D. Lower homogeneous part of crust
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Surface plates of earth are made ofA. Crust and solid part of upper mantleB. Outer heterogeneous part of crustC. Both outer heterogeneous and lower homogeneous crust.D. Lower homogeneous part of crust

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