Q. Which among the following are sources of magma in the Earth?

1. Molten Outer Core of the Earth
2. Solid Rocks of Earth's Crust
3. Solid Rocks of Mantle

Select the correct option from the codes given below:
Answer: Only 2 & 3
Notes: The molten outer core primarily consists of iron and nickel and is not a source of magma. Magma originates when solid rocks of the Earth's crust and upper mantle partially melt due to high temperatures and pressures. Thus, only the solid rocks of the crust and mantle are considered sources of magma under suitable geological conditions.