Q. Consider the following statements regarding the earthquakes:1. The intensity of earthquake is measured on Mercalli Scale. 2. The magnitude of an earthquake is a measure of energy released.3. Earthquake magnitudes are based on direct measurements of the amplitude       of seismic waves.4. In the Richter scale,each whole number demonstrates a hundredfold increase       in the amount of energy released. 

1. 1,2 and 3
2. 2,3 and 4
3. 1 and 4
4. 1 and 3