Read the following passage and select the option which correctly fill the blanks.

(i) is the point of origin of an earthquake. (ii) measure the strength of an earthquake by estimating the amount of energy released at the focus. The point vertically above the origin point on the surface of the Earth, is (iii). Seismic waves are detected, recorded and measured using (iv).

Option	(I)	(ii)	(iii)	(iv)
A	Epicentre	Seismograph	Focus	Seismologists
B	Focus	Seismology	Epicentre	Seismograph
C	Focus	Seismologists	Epicentre	Seismograph
D	Epicentre	Seismology	Focus	Seismologists