Given Answer in book is B. (Objective intensity of the quakes with the epicentre). ..But why ? It should be subjective intensity because it is just based on experience of people and other things. If I assume for a while that it is given in answer Objective Intensity because Mercalli Scale also has numbers from 1 to 12 (roman). then Answer could be Option D. Why option B is given ??? Is it correct or wrong??