Read the given paragraph carefully and select the option which correctly fill the blanks (i-iv). Earthquakes are sudden tremors caused due to the disturbances within the Earth's __(i)__ due to rubbing of __(ii)__ against each other. __(iii)__ is used to record intensity, direction and duration of earthquakes while __(iv)__ is used to measure the magnitude of earthquake.
| (i) | (ii) | (iii) | (iv) | |
| A | Core | Techtonic plates | Richter scale | Seismogram |
| B | Mantle | Techtonic plates | Seismogram | Richter scale |
| C | Crust | Techtonic plates | Seismogram | Richter scale |
| D | Crust | Techtonic plates | Richter scale | Seismogram |
C