Question

2) A: Intensity of an earthquake is a measurement
of the energy released during an earthquake.
R: Mercallis scale is used to measure intensity
of an earthquake.
1)only A is correct
2)only R is correct
3)both A and R are correct and R is the correct explanation of A
4)both A and R are correct but R is not the correct explanation of A​

Answer 1

Explanation:

3)both A andR is correct