I to XII ( B )
Explanation:
The Mercalli scale is tool used to measure the intensity and effects of an earthquake ( ranking ) it is also known as the Mercalli intensity scale. it measure the intensity of earthquakes based on the observed effects of the earthquake usually on a linear measurement. unlike the Richter scale which measures the seismic waves that might have caused the earthquake and also consider the earthquake's Magnitude
The Mercalli scales ranks earthquakes from I to XII. Mercalli scale was invented by Giuseppe Mercalli in 1902 although it is not as scientific as the Richter scale it is very useful because its takes into consideration the effects of the Earthquake while ranking the quake.