Answer:
Option (B)
Explanation:
Magmas are often considered to be one of the main sources for the formation of various types of metallic and non-metallic ore deposits. These magmas have the possibility to come out on the surface during the time of volcanic eruptions.
During a volcanic eruption, the pyroclastic materials along with volcanic ashes and blocks are ejected. Many toxic gases are also released. These ejected materials are in the form of liquid during eruption and are comprised of different metallic ore deposits, and when it comes out from the earth's crust, it cools down immediately and forms volcanic rocks (extrusive).
The metallic ores are concentrated in these rocks. So, these ore deposits are most likely to be found near the base of a volcano on the surface of the earth.
Thus, the correct answer is option (B).
