Answer:
Option (2)
Step-by-step explanation:
Rocks are the aggregates of minerals are are present on earth since a large geological time. The age of these rocks are usually determined with the help of a technique that is commonly known as the radioactive dating. It is one of the applicable method that is used to calculate the accurate age of a rock depending upon the amount of radioactive isotope that is present in it. There are various methods of dating such as Uranium-Lead dating, Potassium-Argon dating and Carbon dating. These methods are commonly used by the geologists.
Thus, the correct answer is option (2).