Fact 1: Vein deposits of gold and silver are formed by igneous intrusion.

Fact 2: Intrusive igneous rocks form underground.

Given the two facts above, answer the question "Where are gold and silver formed naturally?" with the following options: 
- inactive
 - Near platinum alloys
 - electrically
 - aqueous solution
 - eukyarotes
 - In a royal palace
 - Above ground
 - Underground


 

        Underground 