The correct option is 2 and 3 only.
Explanation
According to the Theory of Plate Tectonics, the Earth's lithosphere is divided into rigid slabs called tectonic plates. These plates move horizontally over the asthenosphere. They are classified into major and minor plates based on their size and are composed of either continental crust, oceanic crust, or a combination of both.
Statement 1 is Incorrect:
The Eurasian Plate is largely a continental plate, not an oceanic one. It supports the bulk of the continents of Europe and Asia. In contrast, the Pacific Plate is an example of a largely oceanic plate.
Statement 2 is Correct:
Tectonic plates are not strictly confined to continental or oceanic boundaries. The Eurasian Plate includes the continental crust of Europe and Asia as well as the adjacent oceanic crust extending westward to the Mid-Atlantic Ridge and northward into the Arctic Ocean.
Statement 3 is Correct:
The Eurasian Plate is classified as one of the seven major plates. The seven major plates are:
- Antarctica and the surrounding oceanic plate
- North American plate (including western Atlantic floor separated from the South American plate along the Caribbean islands)
- South American plate (including western Atlantic floor separated from the North American plate along the Caribbean islands)
- Pacific plate
- India-Australia-New Zealand plate
- Africa with the eastern Atlantic floor plate
- Eurasia and the adjacent oceanic plate
Key Takeaway:
The Eurasian Plate is a major tectonic plate that is predominantly continental but includes significant portions of the adjacent Atlantic and Arctic oceanic crusts.